Particular plaintext detector

Details Particular plaintext detector Particular plaintext detector

2007-12-18

2007-12-18

Vu, Kim (Department: 2135)

Cryptography

Communication system using cryptography

Having plural band pass filters

C380S028000, C380S042000

Reexamination Certificate

active

10679879

ABSTRACT:
An object is to enhance the difficulty in decrypting ciphertext. In order to do input into an encryption algorithm that receives plaintext to output ciphertext, a particular plaintext detector for detecting that the plaintext satisfying a predetermined condition is inputted, the particular plaintext detector includes: a receiving part for receiving the plaintext; a counter part for separating a predetermined part from a bit string forming the plaintext into a fixed part and a remaining part into a variable part, counting the inputted plaintext having a value of the fixed part included in a set of values of the fixed parts at every set of the values of the fixed parts formed of 1 or a plurality of the values of the fixed parts, and storing it as a separate count; and a detecting part for outputting a detection signal when at least one of the separate counts exceeds a predetermined number. The particular plaintext detector is used to receive a detection signal for proper action, which allows the increased difficulty of decryption.

REFERENCES:
patent: 5444781 (1995-08-01), Lynn et al.
patent: 5768276 (1998-06-01), Diachina et al.
patent: 5958073 (1999-09-01), White
patent: 5987124 (1999-11-01), Matyas et al.
patent: 6005944 (1999-12-01), Blaze
patent: 6094486 (2000-07-01), Marchant
patent: 6314186 (2001-11-01), Lee et al.
patent: 6415030 (2002-07-01), Matsui et al.
patent: 6775769 (2004-08-01), Inada et al.
patent: 2003/0182435 (2003-09-01), Redlich et al.
patent: 1 033 405 (2000-09-01), None
patent: WO9967421 (1999-12-01), None
Kasumi Specification. Specification of the 3GPP Confidentiality and Integrity Algorithms. Version 1.0, Dec. 23, 1999. p. 8-17.

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