| 摘要 |
<p>The present invention teaches a method for selectively preventing the access by a client to data-on-demand (DOD) services comprising the acts of: receiving at least one DOD service (706, 707), and receiving at least one associated expiration information packet corresponding to the at least one DOD service (704), wherein the at least one expiration information packet indicates a first predetermined time after which the at least one DOD service may no longer be accessed; and storing at least a portion of the at least one DOD service in memory location (708). In a second embodiment the method further comprises the act of receiving at least one associated copy protection information packet corresponding to the at least one DOD service (804, 834, 854), wherein the at least one copy protection information packet indicates a second predetermined time after which copying of the at least one DOD service will be hindered.</p> |
