H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 9/14 (2006.01) H04N 7/167 (2006.01) H04N 7/173 (2006.01)
Patent
CA 2447208
Streaming content is encrypted by segmenting the content into a plurality of crypto periods, and by encrypting the content for each of a plurality of crypto periods with a different cryptographic key. The crypto periods are based on either (i) fixed time intervals, (ii) a fixed number of packets, (iii) a fixed marker count, or (iv) a pseudo random number of packets. Methods are provided for determining how to record the key changing criteria, and how to convey this information to VOD servers.
Chen Annie On-Yee
Cochran Keith R.
Hutchings George T.
Murphy Patrick
Okimoto John I.
General Instrument Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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