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:
Jan. 24, 2006
Filed:
Oct. 16, 2001
James Darren Parker, Tempe, AZ (US);
Satish Anand, Chandler, AZ (US);
James Darren Parker, Tempe, AZ (US);
Satish Anand, Chandler, AZ (US);
Corrent Corporation, Tempe, AZ (US);
Abstract
An encryption processing system implements an encryption algorithm using a memory system comprising a multiple-port memory by performing at least one set of parallel read and write operations to the memory. The algorithm is, for example, the conventional ARCFOUR (or RC4) algorithm, and the key and state array used in the ARCFOUR algorithm are stored in the multiple port memory. During execution of the ARCFOUR algorithm, a read from one port of the multiple port memory of a state array value is done while another port is used to write a new value to the state array. The use of such parallel read and write operations uses a comparator system that determines whether to use certain previously-read values from the state array or to read a new value from the state array when selecting the pseudorandom K byte to calculate the output data byte.