Java card realization method supporting digital signature

Abstract

The invention provides a java card realization method supporting digital signature, and belongs to the field of information security. The adopted method comprises the following steps that a java card virtual machine executes a called function according to a function calling instruction; through the execution of the first function, transmitted first data information is stored as a private key, a public key is calculated according to the private key, second data information and the public key are subjected to Hash calculation, the obtained Hash result is used as a first middle value, calculation mode information is stored as a signature mode, and the public key, the transmitted second data information and the first middle value are stored; a first vector value is updated through the execution of a second function; through the execution of a third function, a storage region is allocated, the first vector value and transmitted original data to be signed are subjected to Hash calculation to obtain a second middle value, the private key is obtained, the second middle value and the private key are signed, the obtained signature result is stored into the storage region, the length of the signature result is calculated, and the length of the signature result is returned.

Description

Technical field [0001] The invention relates to the field of information security, in particular to a method for implementing a java card supporting data signature. Background technique [0002] With the rapid development of communication technology, information networks have been widely used, and at the same time computer network crimes have emerged in endlessly. People usually use smart cards that integrate national secret algorithms for identification, so as to achieve the purpose of protecting data security within the information network. [0003] At present, there are many types of smart cards, and the java card is widely used as one of the smart cards. However, during the development process, the technical personnel of the present invention found that the java card cannot support the national secret algorithm, which limits the application of the java card in the aspect of identification . Summary of the invention [0004] In order to solve the shortcomings of the prior art, ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many kinds of smart cards, and the java card is widely used as a kind of smart card. However, the technicians of the present invention find in the process of development that the java card cannot support the national secret algorithm, which limits the application of the java card in identification

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