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Many critics say that current key lengths for SRTP-encryption in popular phone apps like Linphone or CSipSimple are not sufficient anymore.

What should be a recommended key length nowadays?

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    "Many critics say..." - could you please add some sources for this claim? Commented Jul 17, 2018 at 10:18
  • @SteffenUllrich: Uh, I thought people were talking about this in the Linphone mailing list. I will have a look if I can find it again! Commented Jul 17, 2018 at 10:31
  • Also some context would be helpful. What are the current key lengths for these phones? Commented Jul 17, 2018 at 21:24
  • The encryption algorithm used would also be useful. The default seems to be AES, but it sounds like you can substitute other algorithms as well. Commented Jul 17, 2018 at 21:29

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