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This is very similar to another question I'm asking, but still a little different. Both questions are attacking the same problem, and I really just need one or the other answered:

https://stackoverflow.com/questions/13443236/how-can-you-make-rtmfp-encrypt-streams-using-256-bits-not-128

Basically I know that RTMFP, for the most part, uses 128-bit encryption for streaming. But is this statement just an over-generalization to some extent? Is there some particular part of the process, while streaming audio and video, specifically on which it uses 256-bit encryption?

Thanks!

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  • Is there a reason it needs to be 256-bit? AES-256 is slower than AES-128, and so I'd imagine for streaming video protocols, depending on the threat model, it's a bit overkill. – mfanto Nov 18 '12 at 19:01
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    It's something that one of our customers is asking for. – Panzercrisis Nov 18 '12 at 19:12
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    @Panzercrisis ask the customer to count the number of digits in 2^126 –  Nov 18 '12 at 20:19
  • @Rajesh you mean 1^128, and because `ln 2 / ln 10 = 0.3` I would expect the number of digits should be about 37. – Maarten Bodewes Nov 18 '12 at 22:54
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    @owlstead not a mistake there, the best known attack on full AES is only better than a brute force by a factor of 4. [Biclique cryptanalysis of the full AES](http://research.microsoft.com/en-us/projects/cryptanalysis/aes.aspx) –  Nov 19 '12 at 02:20
  • hashes? hash --> send --> rtmfp encryption happens here --> unhash --> read does this not add that layer? – Jason Reeves Dec 01 '12 at 05:54
  • Can you do that in AS3 while streaming live video and audio? – Panzercrisis Dec 03 '12 at 13:57

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