Re: [Linphone-developers] Set Master Key for SRTP in linphone

[Dmitry Alexandrov]

Greg Troxel <gdt@lexort.com> wrote:
> Dmitry Alexandrov <dag@gnui.org> writes:
>
>>> When people and programs simply say "SRTP", I think they could mean either 
>>> of these:
>>>   Session Description Protocol (SDP) Security Descriptions for Media 
>>> Streams https://tools.ietf.org/html/rfc4568 SRTP Extension for DTLS 
>>> https://tools.ietf.org/html/rfc5764
>>
>> Any example of the latter?
>
> I don't know if people really use DTLS-SRTP.

Yes, this is what people mostly use.  Not with SIP, though, but with WebRTC.

>> They could rather mean SRTP proper.
>
> I don't follow "SRTP proper".  If you mean "just SRTP without a key 
> management protocol"

Yes, just SRTP by itself.  Whatʼs wrong with it?  You can decompose it even 
further and refer to just RTP and just AES, cannot you?

> then this requires a UI at each end to input the same key

No, this usually requires some another protocol for key negotiation.

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