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:
Mar. 27, 2001
Filed:
Jun. 03, 1999
Russell Hobson, Glasgow, GB;
Peter McGinn, Austin, TX (US);
Atmel Research, Georgetown, KY;
Abstract
A co-processor (FIG.,) for performing modular multiplication comprising: means for receiving B and N binary data streams (bstr, nstr); means for receiving a data value A; adder means (Add,, Add,), subtractor means (Sub,, Sub,, Sub,) and multiplier means (Mul,, Mul,) coupled to sequentially process the B and N binary data streams and the data value A to produce a modulo-reduced multiplication value (A*B) mod N; and further including exponentiation means (FIG.,) comprising: random access memory (E-RAM) for holding an exponent value; parallel-serial interface means for receiving in parallel from the random access memory the exponent value and for producing therefrom a binary data stream E; control means (CONTROL) for receiving the binary data stream E and for initiating a squaring or a multiply operation in dependence on the value of each bit thereof.