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US007184550B2
(12) United States Patent ao) Patent No.: Us 7,184,550 B2
Graunke (45) Date of Patent: Feb. 27,2007
(54) METHOD AND APPARATUS FOR
SIMULTANEOUS DECRYPTION AND
RE-ENCRYPTION OF PUBLICLY
DISTRIBUTED CONTENT VIA STREAM
CIPHERS
(75) Inventor: Gary L. Graunke, Hillsboro, OR (US)
(73) Assignee: Intel Corporation, Santa Clara, CA (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 735 days.
(21) Appl. No.: 10/222,093
(22) Filed: Aug. 15, 2002
(65) Prior Publication Data
US 2004/0032950 Al Feb. 19, 2004
(51) Int. CI.
H04L 9/18 (2006.01)
(52) U.S. CI 380/42; 726/26; 380/277
(58) Field of Classification Search 380/42,
380/277; 726/26 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
6,286,103 Bl * 9/2001 Maillard et al 726/26
