Samhain138 asks: "My company streams video via multicast in a pretty large network. They have a client program for viewing this video stream. Everything works fine, and since the stream is ISMA MPEG-4, almost any player would be able to view it. Lately, they've been looking for a solution for encrypting the video on-the-fly with minimal delay, however all of the solutions they've come across require something physical (dongle, smart-card) which may cause a problem (we can't physically reach all the viewers and it might also become expensive when we have a lot of viewers). Can Slashdot readers suggest anything that is simple to implement (or buy...)?"
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