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:
Jul. 27, 2004
Filed:
Oct. 25, 2000
Applicant:
Inventors:
Assignee:
Ericsson Inc., Research Triangle Park, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/700 ;
U.S. Cl.
CPC ...
G06F 1/700 ;
Abstract
A method and system for performing cryptographic calculations on a bitstring using secret information. A cipher key is manipulated to obtain a modified cipher key. An indicator word is generated that corresponds to the modified cipher key and includes a plurality of indicator bits. A first product is computed with an insecure processor as a function of the bitstring and the modified cipher key. A second product is computed with a secure processor as a function of the bitstring and the indicator. A final product is then computed as a function of the first and second products.