Patent · US Active

Key evolution method and system of block ciphering

US8467526B2 · kind B2 · utility

6Cited by

2References

20Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Jan Kunigk · Eppelheim, DE
Sinja Kunigk · Eppelheim, DE
Sven Lukas · Sindelfingen, DE

Key dates

Filing date	Jun 9, 2008
Grant date	Jun 18, 2013
Priority date	—
Expiry date	Jun 4, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/0631
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A system and associated method for block ciphering. The method generates a key that is specific to a text block being encrypted and later being decrypted. The text block is encrypted by a block cipher encryption with the key. The encrypted text block is decrypted by a block cipher decryption with the key back to the text block. Altering a single bit in either the encrypted text block or the key results in unsuccessful decryption such that a decrypted text block is completely different from the before encryption.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.