Subject: [AVT] SRTP Key lifetime

From: Andrei Iarus <[email-masked]>
Date: Mon, 23 Jun 2008 19:16:52 -0700 (PDT)

Hello,
Here I have a proposal related to the RSTP master key lifetime.
In RFC 3711 (SRTP specs), Subchpater 9.2 it is said that 
This limit of SRTP packets encrypted with a master key is fixed to 2^48 (because of the number of bits of the packet index, isn't it?). 
And now comes the particular case when the derivation rate is 0. Why wouldn't we change its value, when those 48 bits start counting from 0 and just to signal its value to the session members?
Or is this a very particular case? What do you think about this idea?
Thank you,
Andrei

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