Apparatus for computing streamcipher TSC-4

Details Apparatus for computing streamcipher TSC-4 Apparatus for computing streamcipher TSC-4

2008-11-13

2011-12-13

Lim, Krisna (Department: 2453)

Cryptography

Particular algorithmic function encoding

C380S042000

Reexamination Certificate

active

08077864

ABSTRACT:
Provided is an apparatus for computing a T-function based Stream Cipher (TSC)-4 stream cipher. The apparatus includes: two T-function units; and a nonlinear filter for receiving bits output from the two T-function units and generating an 8-bit output sequence per clock. Each of the T-function units includes: a first register for storing an internal state value of the lower N bits; an N-bit internal state updater for updating the internal state value of the lower N-bits stored in the first register; an intermediate result register for storing an intermediate result value output from the N-bit internal state updater; a second register for storing an internal state value of the upper M bits; and an M-bit internal state updater for updating the internal state value of the upper M bits stored in the second register using the value stored in the intermediate result register.

REFERENCES:
patent: 5727062 (1998-03-01), Ritter
patent: 7505588 (2009-03-01), Mironov et al.
patent: 2010/0128870 (2010-05-01), Tsunoo et al.
patent: 10-0226867 (1999-07-01), None
patent: 1020070109154 (2007-11-01), None
Information Society Technologies; “SASC 2006 Stream Ciphers Revisited Workshop Record”, Leuven, Belgium, Feb. 2-3, 2006, ECRYPT Network of Excellence in Cryptology.

Affiliated with

Also associated with

Rating

Apparatus for computing streamcipher TSC-4 does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for computing streamcipher TSC-4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for computing streamcipher TSC-4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4296192