CN1497577A - Device and method for preventing forge/distorting recorded data by digital recorder - Google Patents
Device and method for preventing forge/distorting recorded data by digital recorder Download PDFInfo
- Publication number
- CN1497577A CN1497577A CNA2003101003314A CN200310100331A CN1497577A CN 1497577 A CN1497577 A CN 1497577A CN A2003101003314 A CNA2003101003314 A CN A2003101003314A CN 200310100331 A CN200310100331 A CN 200310100331A CN 1497577 A CN1497577 A CN 1497577A
- Authority
- CN
- China
- Prior art keywords
- digital audio
- frequency data
- data
- forgery
- distorting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The present invention discloses an apparatus for authentication, prevention of forgery/alteration of data recorded by digital voice recorder (DVR) and method thereof. A forgery or alteration prevention unit is installed inside the digital voice recorder or inside the PC connected to the digital voice recorder. The forgery or alteration prevention unit goes through a process to prevent forgery/alteration before audio data is recorded by the digital voice recorder or before audio data is stored at the data storage unit inside the PC. This can be performed by embedding watermark into audio data, by encrypting audio data by a predetermined encryption key, or by inserting a hash value into the audio data. Accordingly, forgery/alteration of audio data recorded by digital voice recorder can be verified.
Description
Technical field
The present invention relates to a kind ofly be used to prevent by digital audio tape (digital voice recorder, DVR) apparatus and method of Ji Lu forgery.More particularly, the present invention relates to a kind of apparatus and method, it utilizes the processing of being scheduled on the data of forging or distorting anti-stop element logarithm word sound-track engraving apparatus record, prevents the forgery of record data.
Background technology
Digital audio tape is a kind of device at recording medium (such as flash memory, DAT, audio tape) identifying recording layer, and it converts speech, sound and other noises to digital signal.
Fig. 1 be a conventional digital sound-track engraving apparatus structured flowchart.
With reference to Fig. 1, digital audio tape 100 comprises: microphone 101, input signal controller 102, A/D converter 103, CPU or microcontroller 104, D/A converter 105, output signal controller 106, loudspeaker or earphone 107, data compressor/decompression machine 110, data storage cell 111, and data link 109, according to user's needs, this digital audio tape 100 can link to each other with personal computer (PC) 108 by data link 109.
At input signal controller 102 places, will control to such an extent that drop in the variation range of A/D converter 103 from the input audio signal of microphone 101.At A/D converter 103 places, will import simulated audio signal and convert digital audio and video signals to.Whole operations of CPU or microcontroller 104 control DVR.Microcontroller 104 is chips, and by construction procedures ROM, data RAM and CPU therein, operation is used to realize the program of the operation of described DVR independently.
Data compressor/decompression machine 110 is stored in it in data storage cell 111 after digital audio-frequency data is compressed; Perhaps, the compressed digital-data in 110 pairs of data storage unit 111 of data compressor/decompression machine carries out decompress(ion).The scope of output signal controller 106 control signals makes the simulated audio signal that is come by D/A converter 105 conversions be fit to the input of loudspeaker or earphone.Loudspeaker or earphone 107 the audio signal output of being stored outside digital audio tape.
Simultaneously, data link 109 is used for and will gives PC by the data transmission of digital audio tape record.Data link 109 is to comprise the PC of serial communication (RS-232, UBS, IEEE 1394 etc.), parallel communications (PC parallel port: SPP, ECP, EPP etc.) etc. and the communicator that digital audio tape couples together.The data that PC 108 receives by digital audio tape 100 records.Although do not specifically illustrate the connection of power supply 112 in the drawings, power supply 112 is to the said apparatus power supply, and this power supply 112 can be realized by battery or AC-DC converter.
The brief description of the operation of above-mentioned digital audio tape 100 is as follows: at first, convert the sound signal of outside to electric signal by microphone 101, and control this electric signal to such an extent that fall in the input range of A/D converter 103 at input signal controller 102 places.Convert controlled sound signal to digital audio and video signals by A/D converter 103.For recorde audio signal, by the digital audio and video signals after data compressor/decompression machine 110 compressing and converting, the signal storage after will being compressed by CPU or microcontroller 104 then is in data storage cell 111.
In order to play the sound signal by digital audio tape 100 records, 110 places decompress to the sound signal that is stored in the data storage cell 111 at data compressor/decompression machine, convert simulating signal at D/A converter 105 places then.Simulated audio signal after output signal controller 106 will be changed converts the signal with OK range to, thereby can be by loudspeaker or earphone output.
In addition, in order to give PC 108 with described audio signal transmission, as in the step of playing audio signal, decompress by the sound signal in 110 pairs of data storage unit 111 of data compressor/decompression machine, by data link 109 it is transferred to PC 108 then.
Above-mentioned digital audio tape mainly is used in the occasion that need write down talks.For example, can be used for writing down after a while may be controversial conference content, for example relevant customer instruction information of selling or buying the stock of a tame joint-stock company.
Yet, owing to have the distrust of the caused message to the digital audio tape record of side of digital audio tape and the distrust between the opposing party, and owing to can forge or distort recorded data like a cork, so need a kind of security solution that can prevent the forgery of these recording audio datas strongly.
To this, the past never countermeasure prevent the forgery of voice data that digital audio tape is write down and distort.Especially, because the authority of control figure sound-track engraving apparatus concentrates on a side who has digital audio tape, so the dispute of relevant its checking probably takes place with its other party.
Summary of the invention
In order to overcome top problem, the invention provides and a kind ofly be used to prevent by the forgery of the data of digital audio tape record and the apparatus and method of distorting, promptly, watermark (watermark) embeds unit, ciphering unit or cryptographic hash (hash value) and inserts the unit, and it can and be distorted in the forgery of verification msg afterwards.
In view of the above, the invention provides a kind of apparatus and method, when by the digital audio tape record data or with data when digital audio tape is transferred to PC, by adopting a kind of can preventing in real time or the forgery of verification msg and the technology of distorting, can verify whether record data are forged or distort when giving PC by the digital audio tape record data or with the data transmission of digital audio tape record.
In order to realize top purpose, the invention provides a kind of anti-locking apparatus of forging or distort, be used in the voice data that is stored in DVR (digital audio tape) inserting and be used to prevent the forgery of voice data or the information of distorting, described DVR comprises: the voice data input block; A/D converter, it will convert digital audio-frequency data to from the analog audio data of described voice data input block; And data storage cell, it stores described digital audio-frequency data, wherein, described forgery or distort anti-locking apparatus and receive described digital audio-frequency data from described A/D converter, and before storing described digital audio-frequency data into described data storage cell, in described digital audio-frequency data, insert the described information of forging or distorting of being used to prevent.
Preferably, described device form with general pcb board, dsp chip plate, FPGA (Flexible Program Gate Array, flexible programming gate array) plate, ASIC (special IC) plate or software program etc. in described digital audio tape is implemented.
In addition, be used for receiving the digital audio-frequency data that is stored in DVR and described digital audio-frequency data be stored in the system among the PC one, a kind of anti-locking apparatus of forging or distort is provided, be used to insert forgery that prevents described digital audio-frequency data or the information of distorting, wherein, described forgery or distort anti-locking apparatus and be arranged among the described PC, and before in the data storage cell that described digital audio-frequency data is stored in described PC, insert the described information of forging or distorting of being used to prevent to described digital audio-frequency data.
According to the first embodiment of the present invention, realize the described insertion that is used to prevent the information of forging or distorting by embed watermark in described digital audio-frequency data, and confirm by detecting described watermark whether described storage digital audio-frequency data is forged or distorts.
Preferably, described watermark is a kind of in robust watermarking (robust watermark) or half fragile watermark (semi-fragi1e watermark), and carries out the embedding of described watermark before the compression of described digital audio-frequency data.
Preferably, described watermark is fragile watermark (fragile watermark); And after the compression of described digital audio-frequency data, carry out the embedding of described watermark.
According to a second embodiment of the present invention, by predetermined encryption key described digital audio-frequency data is encrypted and carried out the described insertion that is used to prevent the information of forging or distorting.
According to the first embodiment of the present invention, carry out the described insertion that is used to prevent the information of forging or distorting by the cryptographic hash of in described digital audio-frequency data, inserting described digital audio-frequency data, the hash function that uses when described storage digital audio-frequency data is applied to obtain described cryptographic hash (hash function), regain a cryptographic hash, whether the cryptographic hash by confirming this new acquisition is consistent with the cryptographic hash in being inserted in described storage digital audio-frequency data, confirms whether described storage digital audio-frequency data is forged or distorts.
In order to realize other purposes of the present invention, the invention provides a kind of method, be used for inserting one and be used to prevent to be stored in the forgery of voice data of DVR or the information of distorting, described DVR comprises: the voice data input block; A/D converter, it will convert digital audio-frequency data to from the analog audio data of described voice data input block; And data storage cell, it stores described digital audio-frequency data, and this method comprises: (a) receive described digital audio-frequency data from A/D converter; (b) be used for preventing that with described the information of forging or distorting is inserted into described digital audio-frequency data in real time; And, (c) the described insertion describedly is used for preventing that the digital audio-frequency data of the information of forging or distorting from storing described data storage cell into.
Simultaneously, the invention provides a kind of method, in being used for receiving digital audio-frequency data that DVR stores and described digital audio-frequency data being stored in system among the PC, insert in the digital audio-frequency data of described reception in described PC and be used to prevent the information of forging or distorting, this method comprises: (a) receive the described digital audio-frequency data that is stored among the described DVR; (b) be used for preventing that with described the information of forging or distorting is inserted into described digital audio-frequency data in real time; And, (c) the described insertion describedly is used for preventing that the digital audio-frequency data of the information of forging or distorting from storing described PC into.
According to the first embodiment of the present invention, carry out described step (b) by embed watermark in described digital audio-frequency data, and confirm by detecting described watermark whether described storage digital audio-frequency data is forged or distorts.
According to a second embodiment of the present invention, carry out described step (b) by described digital audio-frequency data being encrypted with predetermined encryption key.
A third embodiment in accordance with the invention, be inserted into by cryptographic hash and carry out described step (b) in the described digital audio-frequency data described digital audio-frequency data, and the hash function that uses when described storage digital audio-frequency data is applied to obtain described cryptographic hash, regain a cryptographic hash, confirm that whether the cryptographic hash of this new acquisition is consistent with cryptographic hash in being inserted in described storage digital audio-frequency data, confirms whether described storage digital audio-frequency data is forged or distorts.
Description of drawings
Fig. 1 is the structured flowchart of conventional digital sound-track engraving apparatus;
Fig. 2 is the structured flowchart of a digital audio tape, wherein, is installed in outside the described sound-track engraving apparatus according to the anti-stop element of forgery of the present invention;
Fig. 3 is the structured flowchart of a digital audio tape, wherein, is installed in the described sound-track engraving apparatus according to the anti-stop element of forgery of the present invention;
Fig. 4 a shows watermark embedding and the testing process according to first embodiment of the invention;
Fig. 4 b is the structured flowchart that embeds the unit according to the watermark of first embodiment of the invention;
Fig. 5 a shows the encryption and decryption process according to second embodiment of the invention;
Fig. 5 b is the block diagram according to the ciphering unit of second embodiment of the invention;
Fig. 6 a shows the data verification process according to the employing hash function of third embodiment of the invention;
Fig. 6 b is the structured flowchart that inserts the unit according to the cryptographic hash of third embodiment of the invention.
Embodiment
Below, illustrate in greater detail the preferred embodiments of the present invention with reference to accompanying drawing.
At first, illustrate (more particularly with reference to Fig. 2 and Fig. 3 according to the anti-stop element of forgery of the present invention, the anti-stop element of forgery can be that watermark embeds unit, ciphering unit, or cryptographic hash is inserted the unit, these will be illustrated with reference to Fig. 4～6 below in more detail), wherein, used the various embodiments of digital audio tape.
Fig. 2 is the structured flowchart of digital audio tape, wherein, is installed in outside the DVR according to forgery of the present invention/anti-stop element.
With reference to Fig. 2, forge or distort anti-stop element 203 and be installed in the PC 205, to the data that receive from digital audio tape 202, insert forgery and prevent measure.As relevant more detailed explanation of forging or distorting the operation of anti-stop element 203, at first, from microphone 201 input audio signals.Digital audio tape 202 converts the sound signal of being imported digital signal to and writes down this digital signal.Then, for good and all store described sound signal, perhaps if desired, described sound signal is uploaded to PC 205 by data link 109.At this moment, by being installed in the forgery among the PC 205 or distorting anti-stop element 203 and insert predetermined forgery or distort the measure of preventing.Forge or distort and prevent that the information that stop element 203 will be used for verifying is inserted into the data that will be recorded, when determining whether recorded data has been forged or has distorted subsequently, can use the information of being inserted.Then, store described voice data in the predetermined storage medium (data storage cell 204), such as the hard disk drive among the PC 205.
Described forgery or to distort anti-stop element 203 can be that watermark embeds unit, ciphering unit, or cryptographic hash inserts the unit, illustrates in greater detail these unit below with reference to Fig. 4～6.
Fig. 3 is the structured flowchart of a digital audio tape, wherein, is installed in the sound-track engraving apparatus according to the anti-stop element of forgery of the present invention.
With reference to Fig. 3, before the sound signal that will receive conversion and storing into the data storage cell 204 of digital audio tape 302, will be used for preventing that the information of forgery is inserted into described sound signal forging or distort anti-stop element 302 places from microphone 301.Then, give PC 303 audio signal transmission, also can be stored among the PC 303.
In Fig. 3, according to of the present invention be installed in the forgery in the digital audio tape or distort anti-locking apparatus 3022 be implemented as at CPU or microcontroller 104 places and carry out its operation, be embodied as an autonomous device that separates but those skilled in the art can forge or distort anti-locking apparatus 3022.
Being installed in the forgery in the digital audio tape or distorting anti-locking apparatus 3022 can be that watermark embeds unit, ciphering unit, or cryptographic hash insertion unit, hereinafter with reference to Fig. 4～6 these unit is described in detail.
Can adopt forms such as general pcb board, dsp chip plate, FPGA (flexible programming gate array) plate, ASIC (special IC) plate or software program to realize the forgery in Fig. 2 and 3 or distort anti-locking apparatus 203,3022.
To illustrate according to the forgery of first, second and the 3rd embodiment of the present invention below or distort the concrete forgery of anti-locking apparatus 203,3022 or distort the technology of preventing and innerly constitute, in aforementioned forgery or distort in the anti-locking apparatus 203,3022 and used this technology.
The first embodiment of the present invention is according to the forgery of water mark method or distorts the embodiment that prevents locking apparatus.
Fig. 4 a shows watermark embedding and the testing process according to first embodiment of the invention.
With reference to Fig. 4 a, watermark embeds unit 401 embed watermark in input audio signal.The watermark information that is embedded into is the information that is used for verifying the authenticity of voice data subsequently.Watermark embeds unit 401 and is foregoing forgeries of the present invention or distorts anti-locking apparatus.Next, the voice data that is inserted with watermark is stored in the storage unit, thereby has finished the process that is used to prevent the information of forging or distorting according to of the present invention of inserting.
Available in the present embodiment type of watermark comprises robust watermarking, half fragile watermark (SFW), and fragile watermark (FW), and watermark also is to bear external attack or the degree of distorting is classified according to watermark.
Even robust watermarking is meant after the attack that suffers such as compression and A/D conversion, interpolation noise etc., the watermark that still can extract watermark information.The feature of half fragile watermark is, when the attack that suffers such as compression, watermark still is kept perfectly, but suffering when distorting the malicious attack of voice data, and watermark will destroy.The feature of fragile watermark is that even slight distorting arranged, watermark also will destroy.Therefore, if use fragile watermark in the present invention, compression and storage be during data, should be after the compression of voice data embed watermark.
Although Fig. 4 a shows continuous process, but when whether data are forged or distort the problem that becomes care, for adopting according to forgery of the present invention or distorting the voice data that anti-locking apparatus has embedded watermark, normally carry out the process of extracting watermark from independent off-line watermark extracting unit (can be the software program of among PC, realizing).Whether the extraction of watermark can be as the checking of the information of watermark embedding itself, also can destroy according to watermark and check whether the voice data of being stored is forged or distorts.
Fig. 4 b is the structured flowchart that embeds the unit according to the watermark of first embodiment of the invention.That is the forgery among Fig. 2 and 3 or distort the watermark that anti-locking apparatus is embodied as according to first embodiment of the invention and embed the unit.
With reference to Fig. 4 b, watermark embedding unit 401 according to first embodiment of the invention comprises: input signal controller 412, analogue-to-digital converters 413, digital signal processor or microcontroller 414, digital-analog convertor 415, output signal controller 416, and power-supply unit 418.
In the sound signal after digital signal processor or microcontroller 414 places are inserted into conversion with watermark, then there is the sound signal of watermark to convert simulating signal once more to (promptly embedding at D/A converter 415 places, sound signal), there is the simulating signal of watermark to be adjusted to a predetermined scope embedding at output signal controller 416 places then, so that output analog output signal 417.Therebetween, power supply 418 provides necessary power supply to digital signal processor or microcontroller 414.
Wherein, if the watermark of wishing is robust watermarking or half fragile watermark, it is desirable to before the digital audio-frequency data after the conversion is compressed, carry out the embedding of watermark.Usually, if the watermark of wishing is a fragile watermark, then it is desirable to after the digital audio-frequency data after the conversion is compressed, carry out the embedding of watermark.
The second embodiment of the present invention realizes forging or distorting anti-locking apparatus according to the use of cryptographic algorithm.
Fig. 5 a shows the encryption and decryption process according to second embodiment of the invention.
With reference to Fig. 5 a, ciphering unit 501 is encrypted the voice data of input by predetermined cryptographic algorithm.Here, in encryption, used predetermined encryption key.Data encrypted is stored in the data storage cell (not shown).
If in forgery according to the present invention or distort in the anti-locking apparatus and come the encrypted audio data by predetermined encryption key, distorting or forging when becoming the problem that to be concerned about when later data, by locate that in independent off-line decryption unit (it can be the software program of realizing) ciphered data is carried out decrypting process in PC, can confirm whether the data of being stored are forged or distort.The type of encryption system comprises according to the preferred embodiment of the invention: symmetric encryption system (being also referred to as " Public Key Cryptographic Systems ") and asymmetric encipherment system (being also referred to as " secret key encryption system ").In symmetric encryption system, encryption key is identical with decruption key; And in asymmetric encipherment system, encryption key is different with decruption key.
Symmetric encipherment algorithm is characterised in that the speed of encryption and decryption is all very fast, and this cryptographic algorithm comprises DES, 3DES, SEED and Rijndael etc.Rivest, shamir, adelman is characterised in that being difficult to mathematics finds the solution, and the time of deciphering cost is longer, and this cryptographic algorithm comprises RSA, E1Gamal and ECC etc.For the present invention, use any in these cryptographic algorithm can.
The preferred embodiments of the present invention are used 128 Rijndael algorithm, and its NIST by the U.S. is adopted as AES (Advanced Encryption Standard), and the present invention adopts this algorithm to test, and experimental result is as follows.As the TI DSP (TI digital signal processor) that adopts the U.S. when realizing the Rijndael algorithm, such experimental result relates to by the data that are encrypted to 256 bytes and produces the required resource of raw data (Raw Data) that is decrypted into 256 bytes.
* in TI DSP (TMS 320VC5410) when deciphering used resource: 256 bytes
* processing power: about 20MIPS (million instructions per second)
* in TI DSP, decipher the capacity of used program code memory: 10KB (10,714 byte)
* in TI DSP, decipher the capacity of used data-carrier store: 1KB (1,024 byte)
Fig. 5 b is the structured flowchart according to the ciphering unit of second embodiment of the invention.Different with Fig. 4 b, digital signal processor or microcontroller 513 are not carried out the function of embed watermark, and are to use encryption key to carry out the function that digital audio-frequency data is encrypted.In addition, identical with Fig. 4 b explanation is suitable for.
The third embodiment of the present invention adopts hash function to realize forging or distorting anti-locking apparatus.
Fig. 6 a shows the data verification process according to the employing hash function of third embodiment of the invention.
With reference to Fig. 6 a, the voice data of being imported is input in the hash function, this hash function can be represented with following equation 1.It is desirable to use MD5 (Message Digest, eap-message digest 5), but, to be not limited to this as available hash function.
[equation 1]
M
1＝H(I)
Here, I is the input data, and H (x) is a hash function, M
1It is the cryptographic hash that is calculated.
Will be as the cryptographic hash M of the output valve of hash function
1Be inserted in the voice data of being imported, will be inserted with cryptographic hash M then
1Voice data be stored in the storage medium.
Hash function is characterised in that it is an one-way function.That is, can not only infer the input data that are input in this hash function with cryptographic hash.
When in forgery according to the present invention or when distorting the voice data that has inserted the cryptographic hash that goes out by the predetermined Hash function calculation in anti-locking apparatus place and running into the problem whether data be forged or distort subsequently, locate to carry out the proof procedure of cryptographic hash at independent off-line cryptographic hash authentication unit (it can be the software program of realizing) in PC, thereby can confirm whether the data of being stored are forged or distort.
The detailed process of checking cryptographic hash is as follows.The voice data of being stored is by the voice data of being imported self and by hash function being applied to the cryptographic hash M that these data calculate
1Form.By using one to locate to be applied to import the identical hash function of data, obtained a new cryptographic hash M with insert unit (that is, according to forgery of the present invention or distort anti-locking apparatus) in cryptographic hash
2If be inserted into the cryptographic hash M in the voice data of being stored
1With the cryptographic hash M that regains
2Unanimity, then the voice data of being stored is exactly without the raw data of forging or distorting.If these two cryptographic hash M
1And M
2Differ from one another, the data of storing with regard to thinking are forged or have distorted.
Fig. 6 b shows the formation of inserting the unit according to the cryptographic hash of third embodiment of the invention.Different with Fig. 4 b, digital signal processor or microcontroller 513 are not carried out the function of embed watermark, but calculate the cryptographic hash about described digital audio-frequency data, and carry out the cryptographic hash of being calculated is inserted into function in the specific part of voice data.In addition, identical with Fig. 4 b explanation is suitable for.
When the data of will talking are recorded on the digital audio tape (DVR), a kind ofly prevent or confirm the forgery of described data or the technology of distorting by adopting in real time, when the voice data that is necessary to confirm to be stored, aforementionedly the invention provides the effect whether data that affirmation stores are forged or distort.
Although describe the present invention in conjunction with the foregoing description, but this explanation is exemplary, those skilled in the art are appreciated that under the situation of technological thought of the present invention that does not break away from claims and limited and scope, can carry out various modifications.
Claims (13)
1. forge or distort anti-locking apparatus for one kind, be used in the voice data that digital audio tape DVR stores, inserting and be used to prevent the forgery of described voice data or the information of distorting, described DVR comprises: voice data input block, the data storage cell that will convert the A/D converter of digital audio-frequency data to and store described digital audio-frequency data from the analog audio data of described voice data input block
Wherein, described forgery or distort anti-locking apparatus and receive described digital audio-frequency data from described A/D converter, and before storing described digital audio-frequency data into described data storage cell, be used for preventing that with described the information of forging or distorting is inserted into described digital audio-frequency data.
2. be used for receiving the digital audio-frequency data that is stored in DVR and described digital audio-frequency data be stored in the system among the PC a kind of, a kind ofly be used to insert the forgery of the information that is used to prevent the forgery of described digital audio-frequency data or distorts or distort anti-locking apparatus,
Wherein, described forgery or distort anti-locking apparatus and be arranged among the described PC, and before in the data storage cell that described digital audio-frequency data is stored into described PC, be used for preventing that with described the information of forging or distorting is inserted into described digital audio-frequency data.
3. according to the forgery of claim 1 or 2 or distort anti-locking apparatus, wherein, carry out the described insertion that is used to prevent the information of forging or distorting by embed watermark in described digital audio-frequency data, and
Confirm by detecting described watermark whether described storage digital audio-frequency data is forged or distorts.
4. according to the forgery of claim 1 or 2 or distort anti-locking apparatus, wherein, by predetermined encryption key described digital audio-frequency data is encrypted and to be carried out the described insertion that is used to prevent the information of forging or distorting.
5. according to the forgery of claim 1 or 2 or distort anti-locking apparatus, wherein, carry out the described insertion that is used to prevent the information of forging or distorting by the cryptographic hash of in described digital audio-frequency data, inserting described digital audio-frequency data, and
The hash function that uses when described storage digital audio-frequency data is applied to obtain described cryptographic hash, regain a cryptographic hash thus, whether consistent by the cryptographic hash in confirming this cryptographic hash that regains and being inserted into described storage digital audio-frequency data, confirm whether described storage digital audio-frequency data is forged or distorts.
6. according to the forgery of claim 1 or distort anti-locking apparatus, wherein, described device is with general pcb board, dsp chip plate, FPGA (flexible programming gate array) plate, ASIC (special IC) plate, or the form of software program realizes in described digital audio tape.
7. according to the forgery of claim 3 or distort anti-locking apparatus, wherein, described watermark is a kind of in robust watermarking or half fragile watermark, and
Before the compression of described digital audio-frequency data, carry out the embedding of described watermark.
8. according to the forgery of claim 3 or distort anti-locking apparatus, wherein, described watermark is a fragile watermark; And
After the compression of described digital audio-frequency data, carry out the embedding of described watermark.
9. an insertion is used for preventing being stored in the forgery of voice data of DVR or the method for the information of distorting, described DVR comprises: voice data input block, the data storage cell that will convert the A/D converter of digital audio-frequency data to and store described digital audio-frequency data from the analog audio data of described voice data input block, and this method comprises:
(a) receive described digital audio-frequency data from A/D converter;
(b) be used for preventing that with described the information of forging or distorting is inserted into described digital audio-frequency data in real time; And
(c) will insert and describedly be used for preventing that the described digital audio-frequency data of the information of forging or distorting from storing described data storage cell into.
10. be used for receiving the digital audio-frequency data that is stored in DVR and described digital audio-frequency data be stored in the system among the PC a kind of, a kind of method be used to prevent the information of forging or distorting of in described PC, in described reception digital audio-frequency data, inserting, this method comprises:
(a) receive the described digital audio-frequency data that is stored among the described DVR;
(b) be used for preventing that with described the information of forging or distorting is inserted into described digital audio-frequency data in real time; And
(c) will be inserted with and describedly be used for preventing that the described digital audio-frequency data of the information of forging or distorting from storing described PC into.
11. according to the method for claim 9 or 10, wherein, carry out described step (b) by embed watermark in described digital audio-frequency data, and
Confirm by detecting described watermark whether described storage digital audio-frequency data is forged or distorts.
12., wherein, carry out described step (b) by encrypt described digital audio-frequency data with predetermined encryption key according to the method for claim 9 or 10.
13. according to the method for claim 9 or 10, wherein, carry out described step (b) by the cryptographic hash of in described digital audio-frequency data, inserting described digital audio-frequency data, and
The hash function that uses when described storage digital audio-frequency data is applied to obtain described cryptographic hash, regain a cryptographic hash thus, whether consistent by the cryptographic hash in confirming this cryptographic hash that regains and being inserted into described storage digital audio-frequency data, confirm whether described storage digital audio-frequency data is forged or distorts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101003314A CN1497577A (en) | 2002-10-15 | 2003-10-14 | Device and method for preventing forge/distorting recorded data by digital recorder |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR62768/2002 | 2002-10-15 | ||
| CNA2003101003314A CN1497577A (en) | 2002-10-15 | 2003-10-14 | Device and method for preventing forge/distorting recorded data by digital recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1497577A true CN1497577A (en) | 2004-05-19 |
Family
ID=34256237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101003314A Pending CN1497577A (en) | 2002-10-15 | 2003-10-14 | Device and method for preventing forge/distorting recorded data by digital recorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1497577A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399669B (en) * | 2008-10-23 | 2010-09-15 | 福建实达数码科技有限公司 | Authentication method for realizing data reality of recorded sound or video |
| CN101098478B (en) * | 2006-06-29 | 2011-04-06 | 三星电子株式会社 | Device and method for providing video stream with integrity |
| CN101222323B (en) * | 2004-10-29 | 2011-09-07 | 汤姆森许可贸易公司 | Safety authentication channel |
| CN101609675B (en) * | 2009-07-27 | 2011-09-21 | 西南交通大学 | A Fragile Audio Watermarking Method Based on Centroid |
| CN102915740A (en) * | 2012-10-24 | 2013-02-06 | 兰州理工大学 | Phonetic empathy Hash content authentication method capable of implementing tamper localization |
| CN106909341A (en) * | 2015-12-23 | 2017-06-30 | 展讯通信（上海）有限公司 | The enabled method of the functional module based on register, device and mobile terminal |
| CN109167779A (en) * | 2018-08-28 | 2019-01-08 | 四川长虹电器股份有限公司 | A kind of data reliability verification solution based on Redis |
| CN110266889A (en) * | 2019-06-26 | 2019-09-20 | 四川神琥科技有限公司 | A method of record and protection recorded audio are distorted by editing |
-
2003
- 2003-10-14 CN CNA2003101003314A patent/CN1497577A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222323B (en) * | 2004-10-29 | 2011-09-07 | 汤姆森许可贸易公司 | Safety authentication channel |
| CN101098478B (en) * | 2006-06-29 | 2011-04-06 | 三星电子株式会社 | Device and method for providing video stream with integrity |
| US8185742B2 (en) | 2006-06-29 | 2012-05-22 | Samsung Electronics Co., Ltd. | Device and method for providing video stream having integrity |
| CN101399669B (en) * | 2008-10-23 | 2010-09-15 | 福建实达数码科技有限公司 | Authentication method for realizing data reality of recorded sound or video |
| CN101609675B (en) * | 2009-07-27 | 2011-09-21 | 西南交通大学 | A Fragile Audio Watermarking Method Based on Centroid |
| CN102915740A (en) * | 2012-10-24 | 2013-02-06 | 兰州理工大学 | Phonetic empathy Hash content authentication method capable of implementing tamper localization |
| CN102915740B (en) * | 2012-10-24 | 2014-07-09 | 兰州理工大学 | Phonetic empathy Hash content authentication method capable of implementing tamper localization |
| CN106909341A (en) * | 2015-12-23 | 2017-06-30 | 展讯通信（上海）有限公司 | The enabled method of the functional module based on register, device and mobile terminal |
| CN109167779A (en) * | 2018-08-28 | 2019-01-08 | 四川长虹电器股份有限公司 | A kind of data reliability verification solution based on Redis |
| CN110266889A (en) * | 2019-06-26 | 2019-09-20 | 四川神琥科技有限公司 | A method of record and protection recorded audio are distorted by editing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9270859B2 (en) | Utilizing data reduction in steganographic and cryptographic systems | |
| CN101262599B (en) | Method and system for data processing | |
| CN1199389C (en) | Method, device and medium for transfering and recording content information and decipher method and device | |
| CN1541391A (en) | System, method and device for playback of recorded audio, video or other content from non-volatile memory card, optical disc or other media | |
| WO2012031490A1 (en) | Multimedia file encryption method and apparatus | |
| CN1801919A (en) | Copy prevention method and apparatus for digital video system | |
| EP1874056A3 (en) | Device and method for providing video stream having integrity | |
| EP2723014A3 (en) | Information processing apparatus, information recording medium manufacturing apparatus, and information recording medium | |
| JP2003195759A5 (en) | ||
| JP2010541299A5 (en) | ||
| EP1548732A3 (en) | Method and apparatus for processing information, information storage medium, and computer program | |
| CN1533648A (en) | Apparatus and method for generating data for detecting false alterations of encrypted data during processing | |
| KR100534056B1 (en) | Apparatus for authentication, prevention of forgery/alteration of the data recorded by digital voice recorder and method thereof | |
| CN115910080A (en) | Communication audio digital watermark writing and reading method and device | |
| CN1497577A (en) | Device and method for preventing forge/distorting recorded data by digital recorder | |
| CN101458929A (en) | Generating water marked copies of audio signals and detecting them using a shuffle data store | |
| CN1925048A (en) | Information processing apparatus and information processing method | |
| CN102158768B (en) | Watermark Embedding and Extraction Method for Video Authentication Based on MP4 File Encapsulation Format | |
| CN114119332A (en) | Block chain-based digital watermark writing and reading method and device | |
| CN1388929A (en) | watermark detector | |
| CN114999502B (en) | Voice content watermark generation, embedding method, voice content integrity authentication and tampering location method based on adaptive word framing | |
| CN101223599B (en) | Reproducing apparatus, recording apparatus, data processing method, data recording method, and integrated circuit | |
| CN100514252C (en) | Device and method for generating encrypted data, for decrypting encrypted data and for generating re-signed data | |
| CN1432155A (en) | Interleaving appts. and deinterleaving appts. | |
| CN117877473A (en) | Audio file processing method, device, equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |