Triple authentication method based on block cipher

Abstract

The invention discloses a triple authentication method based on a block cipher. The triple authentication method comprises the following steps of: generating a random number RB after an authenticated terminal receives a certification instruction, dividing the RB into an RB1 and an RB2, acquiring a Token RB according to the RB and returning the Token RB to an authentication terminal; acquiring the RB, the RB1 and the RB2 after the authentication terminal receives the Token RB, plusing a random number RA of the authentication terminal, forming a TokenAB through a block cipher operation, and transmitting the TokenAB into the authenticated terminal; carrying out the block cipher operation after the authenticated terminal receives the TokenAB to obtain the random number RA or a part or all of RB1 data; forming a TokenBA if the random number RA and a part or all of RB1 data are consistent after comparison, and transmitting the TokenBA into the authentication terminal; and recovering a part or all of RA and a part or all of RB2 by the authentication terminal through the block cipher operation again, and judging the triple certification passes if the a part or all of RA and a part or all of RB2 are consistent after comparison. The invention can improve the authentication of the identity legitimacy of two communication terminals and ensure the data security in the communication process.

Description

technical field [0001] The invention relates to a triple authentication verification method between two communication terminals, in particular to a triple authentication method based on a block cipher algorithm for communication between a non-contact logical encryption card and a card reader. Background technique [0002] With the continuous expansion of the application range of contactless logic encryption cards, the security requirements for contactless logic encryption cards are also getting higher and higher. From the perspective of application, the non-contact logical encryption card not only needs to complete basic operations such as command execution, data reading and writing, and logic operations, but also needs to perform identity verification and identification with the card reader from a security perspective. Ensure data security during communication. In order to meet these requirements, the non-contact logical encryption card must have an authentication function...

AI Technical Summary

Problems solved by technology

However, in the process of authentication verification and communication encryption, most non-contact logical encryption cards use stream encryption algorithms based on sequence ciphers. Under the current security requirements, non-contact logical encryption cards with this security strength have been It does not meet the application requirements, and needs a non-contact logical encryption card with higher security strength to fill the current security requirements

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