Researching structure and of cryptographic strength of the modification of gamma cipher
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Abstract
The article deals with the problem of information security of electronic documents. Special attention is focused on cryptographic algorithms for encryption, since it is the main mechanism ensuring the confiden-tiality of documents. The basic requirements for the development of cryptographic systems of electronic document protection has been considered in the article. The improved method of gamma cipher which takes into account the shortcomings of existing algorithms was suggested. Encryption of proposed meth-ods improved by changing the key sequence with each blocks of information. The block diagram of encrip-tion with the modification of gamma cipher was built in result. The criteria that affect the cryptographic strength of encryption were determined. The cryptographic strength of electronic document protection sys-tem built on the basis of the proposed method was researched. Using this modification will increase the effectiveness of electronic documents protection.
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