CPC H04N 21/2347 (2013.01) [G06F 21/57 (2013.01); H04L 9/16 (2013.01); H04L 9/3213 (2013.01); H04N 7/167 (2013.01); H04N 21/26606 (2013.01); H04N 21/26613 (2013.01); H04N 21/4181 (2013.01); H04N 21/4405 (2013.01); H04N 21/4623 (2013.01)] | 18 Claims |
1. A method for decrypting encrypted media content, the method comprising:
receiving and storing an encrypted content key for decrypting encrypted media content;
evaluating an access condition and, if the access condition is met, decrypting the content key and enabling a descrambler to use the content key to decrypt the encrypted media content;
receiving the encrypted media content and decrypting the encrypted media content using the content key;
re-evaluating within an interval whether use of the content key should remain enabled; and,
if the re-evaluation is negative, preventing the descrambler from using the content key after the interval has passed in response to the re-evaluation even though the content key remains valid.
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