[AVT] SRTP question

["Steffen Fries" <steffen.fries at siemens.com>]

Hi,

I've got a question to the authentication key length in SRTP. 
RFC3711 describes the authentication function and the 
authentication key length within section 4.2 and the key 
derivation within section 4.3.
Within section 8.2 the values for a SRTP policy are stated. For 
the session authentication key a default length of 160 bits is 
pointed out. Later in the key derivation test vector section B.3 
the authentication key length is mentioned with 94 octets.

What is the reason for the length differences?

Steffen

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