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:
Nov. 28, 2006
Filed:
Nov. 29, 2000
James D. Dworkin, Chandler, AZ (US);
Michael J. Torla, Chandler, AZ (US);
James D. Dworkin, Chandler, AZ (US);
Michael J. Torla, Chandler, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A Message Digest Hardware Accelerator (MDHA)for implementing multiple cryptographic hash algorithms such as the Secure Hashing Algorithm 1 (SHA-1), the Message Digest 4 (MD4) algorithm and the Message Digest 5 (MD5) algorithm. A register file () is initialized to different data values. A function circuit () performs logical operations based on the selected algorithm and provides a data value to a summing circuit () that is summed with mode dependent constant values selected from registers (and), round and step dependent data words generated by a register array block () to calculate the hash value for a text message stored in registers ().