The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2006
Filed:
Sep. 13, 2001
Applicants:
Richard J. Swindlehurst, Phoenix, AZ (US);
Joel D. Feldman, Phoenix, AZ (US);
Inventors:
Richard J. Swindlehurst, Phoenix, AZ (US);
Joel D. Feldman, Phoenix, AZ (US);
Assignee:
Freescale Semiconductor, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A symmetric key stream processorthat encrypts and decrypts text in accordance with the RC4 algorithm has a main processing blockand a host interface. The main processing blockincludes an Sbox memoryimplemented with a synchronous dual-port RAM and an encryption logic blockwith a finite state machine. The dual port memory architecture is used for efficiency during permutation and message processing.