US 6,983,371 B1
Super-distribution of protected digital content
Marco M. Hurtado, Boca Raton, Fla. (US); James C. Mahlbacher, Lake Worth, Fla. (US); and Richard L. Spagna, Boca Raton, Fla. (US)
Assigned to International Business Machines Corporation, Armonk, N.Y. (US)
Filed on Nov. 13, 2000, as Appl. No. 9/711,431.
Application 09/711431 is a continuation in part of application No. 09/376102, filed on Aug. 17, 1999, granted, now 6,611,812.
Application 09/376102 is a continuation in part of application No. 09/177096, filed on Oct. 22, 1998, granted, now 6,389,538.
Application 09/177096 is a continuation in part of application No. 09/133519, filed on Aug. 13, 1999, granted, now 6,226,618.
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 11/30 (2006.01); G06F 17/60 (2006.01); H04K 1/00 (2006.01); H04L 9/00 (2006.01); H04L 9/32 (2006.01)
U.S. Cl. 713—189 19 Claims
OG exemplary drawing
 
1. A method to deliver encrypted digital content from a first system for playing the content to a second system for playing the content, the method on the second system comprising the steps of:
reading on a second system from a computer readable medium metadata which has previously been associated with a portion of content, wherein the content is encrypted with a first key associated with the first system;
selecting from the metadata associated content to decrypt;
establishing a secure transmission with an authorization authority for decrypting the content; and
receiving a decrypting key for decrypting at least part of the previously encrypted content stored on the computer readable medium as permitted by the authorization authority;
decrypting at least part of the previously encrypted content as permitted by the authorization authority;
reencrypting the decrypted content utilizing a unique local decrypting key;
storing the content in a library; and
decrypting at least part of the content from the library using the unique local decrypting key.