06055314 is referenced by 610 patents and cites 14 patents.

A system and method for secure purchase and delivery of video content programs over various distribution media, including distribution networks and digital video disks, includes an integrated circuit card (e.g., a smart card, PCMCIA card) which is configured to store decryption capabilities for related video programs. The decryption capabilities are initially kept in a secure store at a video merchant. When a purchaser orders a particular video program, the decryption capabilities for that program are downloaded to the IC card, either at the merchant premises or over a distribution network. The video content program is distributed in encrypted format via the distribution media to the purchaser. The IC card uses the decryption capabilities to at least partly decrypt the video content program without exposing the decryption capabilities.

Title
System and method for secure purchase and delivery of video content programs
Application Number
8/620603
Publication Number
6055314
Application Date
March 22, 1996
Publication Date
April 25, 2000
Inventor
Daniel R Simon
Redmond
WA, US
Terence R Spies
Kirkland
WA, US
Agent
Lee & Hayes PLLC
Assignee
Microsoft Corporation
WA, US
IPC
H04K 1/00
H04L 9/00
H04N 7/167
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