[VOIPSEC] What the role TGK of MIKEY played in the SRTP?

[Johan Bilien]

On Thu, Dec 15, 2005, dennis wrote:
> In Appendix_A of RFC3830(MIKEY), by "TEK" it means the
> "SRTP master key".
> In MIKEY - SRTP Relation, what the role TGK played ? 

The TGK is used to derive one TEK for each SRTP stream to protect (think
audio and video). This is done according to section "4.1.3.  Generating
keys from TGK".

Best regards,
Johan.