11.4. Summary of basic scenarios

The description of these scenarios highlights some recommendations on the use of SRTP, mainly related to re-keying and large scale multicast:

Do not use fast re-keying with the <From, To> feature. It may, in particular, give problems in retrieving the correct SRTCP key, if an SRTCP packet arrives close to the re-keying time. The MKI SHOULD be used in this case.
If multiple SRTP streams in the same RTP session share the same master key, also moderate rate re-keying MAY have the same problems, and the MKI SHOULD be used.
Though offering increased security, a non-zero key_derivation_rate is NOT RECOMMENDED when trying to minimize the number of keys in use with multiple streams.

11.4. Summary of basic scenarios​