Title:
METHOD FOR THE CRYPTOGRAPHIC CONVERSION OF DIGITAL DATA BLOCKS
Document Type and Number:
WIPO Patent Application WO/2004/084484
Kind Code:
A1
Abstract:
The invention relates to telecommunication, in particular to cryptographic methods and devices for protecting information transmitted through telecommunication networks. The inventive method increases a cryptological hardness with respect to a differential cryptoanalysis and ciphering rate. The essence of said method consists in splitting a digital data block (DDB) into N$m(G)2 n-digit data sub-blocks (DDSB) and, afterwards in carrying out a controlled operational substitution by means of S sequential cycles. Each cycle consists in running Z primitive controlled substitutions and, afterwards a fixed substitution. The controlled operational substitution is run by means of a control vector pre-formed by one of DDSB or by DDSB and a secret key. The examples of the method implementation for a single-side conversion or ciphering are also disclosed.
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Inventors:
MOLDOVYAN ALEXANDER ANDREEVICH (RU)
MOLDOVYAN NIKOLAY ANDREEVICH (RU)
MOLDOVYAN NIKOLAY ANDREEVICH (RU)
Application Number:
PCT/RU2003/000098
Publication Date:
September 30, 2004
Filing Date:
March 17, 2003
Export Citation:
Assignee:
MOLDOVYAN ALEXANDER ANDREEVICH (RU)
MOLDOVYAN NIKOLAY ANDREEVICH (RU)
MOLDOVYAN NIKOLAY ANDREEVICH (RU)
International Classes:
H04L9/06; (IPC1-7): H04L9/18; H04L9/06
Foreign References:
| RU2188513C2 | 2002-08-27 | |||
| DE19960047A1 | 2000-08-17 | |||
| EP1292067A1 | 2003-03-12 | |||
| US5442705A | 1995-08-15 |
Attorney, Agent or Firm:
Polikarpov, Alexander Viktorovich (St.Petersburg, 6, RU)
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