Method for encrypting USB flash disk with fingerprint authentication

Abstract

The invention discloses a method for encrypting a USB flash disk with fingerprint authentication. The USB flash disk is encrypted in a partition mode, namely the USB flash disk is divided into two drives, and a user can select one drive for use according to needs; the current up-to-date symmetric cryptographic algorithm is adopted, is higher in safety level compared with other encrypted USB flash disks and meets the current national conditions; an encryption key is canceled, a secret key is generated from fingerprints, and a file is encrypted or decrypted through the secret key generated from the fingerprints. The secret key is generated from extracted fingerprint characteristic values through a pseudo-random number generation algorithm, in this way, only the fingerprint characteristic values need to be stored, storage space needing to be occupied is reduced, information quantity is reduced, the possibility of effective information disclosure is reduced, fingerprint authentication and the encryption and decryption processes are combined, safety of an overall system is improved, the user can use the USB flash disk conveniently, and the trouble that the user forgets a common command is saved. The file encrypting operation is based on the homemade symmetric cryptographic algorithm, and the independent and controllable requirements for information safety products by China are met.

Description

technical field [0001] The invention relates to the field of computer technology, and specifically uses a salt value generating algorithm to generate a salt value with sufficient length in combination with a hash algorithm to generate an authentication key, and applies a symmetric cryptographic algorithm to realize encryption of U disk data. Background technique [0002] The fingerprint sensor integrated on the first-generation fingerprint identification mobile U disk is based on the capacitive fingerprint acquisition sensor, which solves the problem of living body identification better than the previous optical sensor, and can prevent fingerprints from being deceived by false fingerprint information. system problem. The first generation of fingerprint recognition U disk is just a simple fingerprint to open the disk, fingerprint lock disk, and the driver of the fingerprint sensor needs to be installed when using it. The fingerprint sensor of the second-generation fingerprin...

AI Technical Summary

Problems solved by technology

The more stored files, the greater the possibility of effective information exposure, and the separation of fingerprint authentication and encryption and decryption processes will lead to reduced security

And at present, our country has announced the symmetric encryption algorithm with independent intellectual property rights in our country, but the existing schemes mostly use 3DES or AES encryption algorithm, which does not conform to our country's characteristics, and does not conform to our country's principle of independent controllability of information security products

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