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:
Feb. 09, 2010
Filed:
Jun. 28, 2002
Dale W. Hopkins, Georgetown, KY (US);
Susan Langford, Sunnyvale, CA (US);
Larry Hines, Santa Clara, CA (US);
Ching-hsuan Chen, Fremont, CA (US);
Dale W. Hopkins, Georgetown, KY (US);
Susan Langford, Sunnyvale, CA (US);
Larry Hines, Santa Clara, CA (US);
Ching-Hsuan Chen, Fremont, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A system and method are described supporting secure implementations of 3DES and other strong cryptographic algorithms. A secure key block having control, key, and hash fields safely stores or transmits keys in insecure or hostile environments. The control field provides attribute information such as the manner of using a key, the algorithm to be implemented, the mode of use, and the exportability of the key. A hash algorithm is applied across the key and control for generating a hash field that cryptographically ties the control and key fields together. Improved security is provided because tampering with any portion of the key block results in an invalid key block. The work factor associated with any manner of attack is sufficient to maintain a high level of security consistent with the large keys and strong cryptographic algorithms supported.