[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

From: Greg Troxel
Subject: Re: [Linphone-developers] Set Master Key for SRTP in linphone
Date: Thu, 04 Jun 2020 14:50:08 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (berkeley-unix)

Dmitry Alexandrov <> writes:

> Greg Troxel <> wrote:
>> Dmitry Alexandrov <> 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 SRTP Extension for DTLS 
>>> 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.

I see - that makes sense.  But I was thinking SIP, with linphone.

>>> 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?

Sure, you can talk about decomposition.  But we are talking about a UI
button labeled SRTP that does not have a key management option or a
manual key option.

>> then this requires a UI at each end to input the same key
> No, this usually requires some another protocol for key negotiation.

But then that isn't 'just SRTP'.  It's SRTP with Key Manaegment Protocol
X, which usually has a name like SDES-SRTP or ZRTP.

I have never seen anything do SRTP where users are expected to enter
keys manually.  So the choice is about the key management protocol,
which needs to be specified.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]