Encipher method and decipher method

Details Encipher method and decipher method Encipher method and decipher method

1990-11-27

1992-04-07

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

380 29, 380 50, 380 23, 380 25, 235380, H04L 906, H04L 928

Patent

active

051034794

ABSTRACT:
There are provided an encipher method of enciphering message data made by a microcomputer or the like at a high speed by using encipher keys which have previously been stored in a smart card or the like and a decipher method of deciphering the ciphertext made by the encipher method at a high speed by using the encipher keys. The encipher method and the decipher method are suitable for, particularly, a 32-bit microcomputer and include a process expressed by the function Rot.sub.2 i(x) (i=2, 3, 4) in each process. Rot.sub.2 i(x) is the process to circular shift a data train x of 32 bits to the left or right by 2.sup.i bits (i=2, 3, 4).

REFERENCES:
patent: 4319079 (1982-03-01), Best
patent: 4982429 (1991-01-01), Takaragi et al.
Shimizu et al., "Fast Data Encipherment Algorithm FEAL"; Papers of the Institute of Electronics & Communication Engineers of Japan; D. vol. J70-D, No. 7, pp. 1413-1423; Jul., 1987.

Affiliated with

Also associated with

Rating

Encipher method and decipher method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Encipher method and decipher method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Encipher method and decipher method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1901394