| US 7,516,327 B2 | ||
| Distributing access to a data item | ||
| Leonard M. Kawell, Jr., Concord, Mass. (US); Thomas R. Diaz, Lexington, Mass. (US); Mary Ellen Heinen, Concord, Mass. (US); and Roger J. Heinen, Jr., Islesboro, Me. (US) | ||
| Assigned to Adobe Systems Incorporated, San Jose, Calif. (US) | ||
| Filed on Jan. 04, 2007, as Appl. No. 11/619,917. | ||
| Application 11/619917 is a continuation of application No. 11/082215, filed on Mar. 15, 2005, granted, now 7,249,382. | ||
| Application 11/082215 is a continuation of application No. 09/167888, filed on Oct. 07, 1998, abandoned. | ||
| Prior Publication US 2007/0277246 A1, Nov. 29, 2007 | ||
| Int. Cl. H04L 9/00 (2006.01) | ||
| U.S. Cl. 713—171 [380/284; 705/51; 705/54; 726/4; 726/27] | 27 Claims |
| 1. A computer-implemented method, comprising:
verifying that a first computer is in the same group as a second computer, each group member identified as a publisher computer,
distributor computer, retailer computer or end-user computer, where members of the group are associated with a common group
key, and where verifying includes:
accepting by the first computer a group key-encrypted signature from the second computer; and
determining whether the second computer is a member of the group based on decrypting the signature with the group key by the
first computer; and
transferring permission data from the first computer to the second computer, the permission data allowing access to an encrypted
data item for a number of end-users through the second computer.
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