Security certificate method based on fingerprint, cryptographic technology and fragile digital watermark

Abstract

The invention discloses a security certificate method based on fingerprint, cryptographic technology and fragile digital watermark, comprising the following steps: a sender collects a fingerprint image, calculates summary information of the fingerprint image and inserts the summary information, a secret key and digital information which is digitally signed and encrypted into the fingerprint image as a watermark; the fingerprint of the sender is collected, the fingerprint image inserted with the watermark is sent to a receiver after the fingerprint of the sender is qualified; after receiving information, the receiver firstly detects and verifies whether the fingerprint image is inserted with the digital watermark and whether the digital watermark is right or not so as to indentify identity authenticity; digital watermark information is extracted from the received image; the summary information of the fingerprint image from which the watermark is extracted is calculated; and the summary information is compared with the summary information of the fingerprint image recorded in the watermark information to approve information authenticity. The invention can effectively overcome the defects that the existing digital signature security certificate can not approve the legal KEY holder and the fingerprint in the fingerprint certificate is easy to clone and embezzle.

Description

technical field [0001] The present invention relates to computer technology, information security technology and information hiding technology, specifically a security authentication method based on the combination of fingerprint, cipher technology and fragile digital watermark to solve network conditions to distinguish identity and information authenticity and non-repudiation. Background technique [0002] Usually, people encrypt their identities and information in computer information security systems mainly through cryptographic technology to ensure the security of their identities, information and communications, but in the Internet age to ensure the security of identities, information and transmission, only password It is often not enough for technology to ensure the security of a system. Whether the encryption and decryption system developed by modern cryptography is a symmetric key system (such as DES) or a more secure public key system (RSA), the ciphertext generated...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a security authentication method based on the combination of fingerprint, cryptography, and fragile digital watermark, so as to solve the problem that only the legality of KEY can be confirmed when digital watermark and digital signature are used to realize security authentication. However, it is impossible to determine the legal holder of the KEY, and the existing computer fingerprint authentication has the technical problem that fingerprints are easily cloned and illegally embezzled, so as to achieve the goal of authenticity and unique non-repudiation authentication

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