Appeal 2007-0463
Application 09/896,537
agent 208 (hereinafter "agent") of the client with a content clearinghouse 206
comprising content 100 on the server 200 (id. at 7, para. 0023). A request to access
content 100 is received from the client 202 (id.). When the server 200 receives
appropriate payment from the client 202 for an M (L<=M<=N) level of access, the
encrypted content 102 is communicated to the client 202, along with the
appropriate key for the level of access subscribed to (id.).
In preferred embodiments, the keys are related by a cryptographic-strength
one-way function (id. at 5, para. 0016). This permits the agent 208 in the client
202 to derive lower keys from the “base key” that corresponds to the client’s
4
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: September 9, 2013