| US 7,590,840 B2 | ||
| Method and system for authorizing client devices to receive secured data streams | ||
| Randy Langer, 3785 Celeste Ct., SE., Port Orchard, Wash. 98366 (US) | ||
| Filed on Sep. 24, 2004, as Appl. No. 10/949,963. | ||
| Claims priority of provisional application 60/506707, filed on Sep. 26, 2003. | ||
| Prior Publication US 2005/0071631 A1, Mar. 31, 2005 | ||
| Int. Cl. H04L 9/00 (2006.01) | ||
| U.S. Cl. 713—156 [726/10] | 33 Claims |
| 1. A method, comprising:
receiving, at a server, a digital certificate from a client;
obtaining a data file associated with the digital certificate;
decrypting an encrypted section of the data file using a fixed key at the server to extract a group key;
decrypting an encrypted section of the digital certificate to extract a client key using the group key; and
sending a program key to the client after encrypting the program key using the client key.
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