Method for generating human vocal print biometric key

Abstract

The invention provides a method for generating a human vocal print biometric key. According to the method, a vocal print characteristic sequence is projected into a high-dimensional space, the characteristic sequence is stabilized within an acceptable fluctuation range in the high-dimensional space, and the stabilized sequence is encoded, and the biometric key is extracted from a code. In the whole method, the vocal print template of a user does not need to be recorded on a to-be-authenticated user side or an authentication server side, the user generates a (user name and key) pair locally by acquiring own voice, and network identity authentication is performed through various authentication methods derived from the (user name and key) pair. The vocal print key can be applied to network identity authentication as well as encryption of various user private data in a safe and convenient manner. The user does not need to remember redundant passwords, and meanwhile a key sequence with a sufficient length can be obtained. The key length of an extracted novel human vocal print biometric key can be greater than 256bit.

Description

Technical field [0001] The invention belongs to the technical field of information security, and specifically relates to a method for directly extracting stable biological keys from human voiceprints through high-dimensional space conversion, which can provide a new authentication method and idea for network identity authentication. Background technique [0002] Voiceprint recognition technology is a relatively mature biometric recognition technology. The accuracy of voiceprint recognition can reach more than 95% in a low-noise environment. The basic method of network identity authentication technology based on voiceprint is: 1) Collect user voice signals, extract user voiceprint features through voice signal processing, generate voiceprint feature templates, and store them in the remote network authentication server; When the user needs to be authenticated, the user's voice signal is collected again to extract the user's voiceprint feature; 3) The user's voiceprint feature is co...

AI Technical Summary

Problems solved by technology

However, this scheme only uses the checkerboard method to stabilize the voiceprint feature value, and the stabilization effect is limited.

And the fact of the chessboard method is to stabilize the characteristic value by reducing the encoding space, such as the value space of 1024 is mapped to the value space of 16, which shortens the length of the key sequence and reduces the security

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