Voice encryption and decryption method for conversion parties on basis of voice print

An encryption, decryption, and voice technology, which is applied in the field of voice encryption and decryption based on voiceprint, can solve the problems of increasing the complexity of voice processing and methods, and achieve the effects of reducing system resource overhead, good security, and fast encryption speed
CN102064937AInactive Publication Date: 2011-05-18HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU DIANZI UNIV
Publication Date
2011-05-18
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a voice encryption and decryption method for conversion parties on the basis of voice print, comprising the following steps of: (1) exchanging a section of shared secret by conversion parties; (2) starting the voice conversation by conversion parties, and determining a format of a network transmission packet; (3) in the process of conversion, calculating the MFCC (Mel Frequency Cepstral Coefficient) parameter of the voice characteristic information of self at certain interval by a voice sender, and extracting a secret key from the MFCC parameter; (4) numbering a voicepacket participating in calculating the MFCC parameter when the voice sender sends the voice packet; (5) receiving the voice packet by a voice receiver, and splicing the voice packet containing sequence numbers in order, calculating the MFCC parameter, and extracting the secret key from the MFCC parameter; (6) after the voice sender finishes sending the voice packet containing the vocal print secret key, sending a countdown voice packet at certain interval; and (7) after receiving the countdown voice packet, beginning countdown by the voice receiver, and replacing the current secret key when time is up, wherein both parties have symmetrical operation from steps (3) to (7). The voice encryption and decryption method generates the secret key by the voice characteristics of conversion parties, the length of the secret key can be chosen as required, and randomness is excellent.
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Description

technical field

[0001] The invention belongs to the technical field of data encryption transmission, and in particular relates to a method for encrypting and decrypting voices of both parties in a conversation based on voiceprints. Background technique

[0002] Voice calls are the basic way of information exchange in the information age society. With the continuous enhancement of people's security awareness, people have higher and higher requirements for the confidentiality of voice calls. Encrypting voice calls is an important technical means to ensure call security.

[0003] Due to the real-time requirements of voice calls, the voice encryption technology must be fast, efficient and safe. Currently used voice call encryption methods are mainly various symmetric encryption algorithms. Compared with asymmetric encryption algorithms (public-private key encryption algorithms), symmetric encryption algorithms are fast and efficient; but for the real-time requirements of voic...

Claims

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