RU2211541C2 - Method for cryptographic conversion of digital data blocks - Google Patents

Method for cryptographic conversion of digital data blocks Download PDF

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Publication number
RU2211541C2
RU2211541C2 RU2001130201/09A RU2001130201A RU2211541C2 RU 2211541 C2 RU2211541 C2 RU 2211541C2 RU 2001130201/09 A RU2001130201/09 A RU 2001130201/09A RU 2001130201 A RU2001130201 A RU 2001130201A RU 2211541 C2 RU2211541 C2 RU 2211541C2
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RU
Russia
Prior art keywords
subblocks
conversion
controlled
control code
digital data
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RU2001130201/09A
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Russian (ru)
Inventor
М.А. Еремеев
н А.А. Молдов
А.А. Молдовян
н Н.А. Молдов
Н.А. Молдовян
Original Assignee
Государственное унитарное предприятие Специализированный центр программных систем "Спектр"
Молдовян Александр Андреевич
Молдовян Николай Андреевич
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Application filed by Государственное унитарное предприятие Специализированный центр программных систем "Спектр", Молдовян Александр Андреевич, Молдовян Николай Андреевич filed Critical Государственное унитарное предприятие Специализированный центр программных систем "Спектр"
Priority to RU2001130201/09A priority Critical patent/RU2211541C2/en
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Publication of RU2211541C2 publication Critical patent/RU2211541C2/en

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Abstract

FIELD: electrical communications and computer engineering. SUBSTANCE: data conversion by using proposed cryptographic method intended for protecting information transferred over telecommunication lines ensures post-conversion pseudorandom variation of total parity of key bits and input data block. Method involves division of digital data block into N≥2 subblocks and alternate conversion of subblocks; one of subblocks is converted by generating control code followed by execution of controlled conversion operation over this subblock. Used as controlled operation is controlled operational substitution; control code is generated by private key and by value of one of subblocks. EFFECT: enhanced stability to linear cryptanalysis. 3 cl, 9 dwg, 1 tbl

Description

Текст описания в факсимильном виде (см. графическую часть)т Description text in facsimile form (see graphic part) t

Claims (3)

1. Способ криптографического преобразования блоков цифровых данных, заключающийся в разбиении блока цифровых данных на N ≥ 2 подблоков и поочередном преобразовании подблоков, причем, по крайней мере, один из подблоков преобразуют путем формирования управляющего кода и последующего выполнения управляемой операции преобразования над ним, отличающийся тем, что в качестве управляемой операции используют управляемую операционную подстановку. 1. The method of cryptographic conversion of digital data blocks, which consists in dividing a digital data block into N ≥ 2 subblocks and subsequently converting the subblocks, at least one of the subblocks is converted by generating a control code and then performing a controlled conversion operation on it, characterized in that as a controlled operation using a controlled operational substitution. 2. Способ по п. 1, отличающийся тем, что управляющий код формируют по секретному ключу. 2. The method according to p. 1, characterized in that the control code is formed by a secret key. 3. Способ по п. 1, отличающийся тем, что управляющий код формируют по секретному ключу и по значению одного из подблоков. 3. The method according to p. 1, characterized in that the control code is generated by the secret key and by the value of one of the subunits.
RU2001130201/09A 2001-11-08 2001-11-08 Method for cryptographic conversion of digital data blocks RU2211541C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2001130201/09A RU2211541C2 (en) 2001-11-08 2001-11-08 Method for cryptographic conversion of digital data blocks

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Application Number Priority Date Filing Date Title
RU2001130201/09A RU2211541C2 (en) 2001-11-08 2001-11-08 Method for cryptographic conversion of digital data blocks

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RU2211541C2 true RU2211541C2 (en) 2003-08-27

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RU (1) RU2211541C2 (en)

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Effective date: 20051109