name: SRTCP
full_form: Secure Real-Time Transport Control Protocol
context: Secure RTCP (SRTCP) provides the same security services to RTCP as SRTP does to RTP. As defined in TS 26.346 [13] only RTCP sender reports are allowed in MBMS. As defined in RFC 3711[11] SRTCP shall be applied to RTCP control packets when SRTP is applied to RTP with the following profiling: - Encryption of SRTCP packets is optional; - SRTCP packets shall be integrity protected as defined in RFC 3711 [11]; - SRTCP shall share master key and master salt with the corresponding SRTP stream; - SRTCP packets shall carry the same MKI field value as the corresponding SRTP stream; NOTE 1: This is a consequence of sharing the same master key. - SRTCP shall use the same encryption algorithm as corresponding SRTP session NOTE 2: SRTCP does not need additional mechanisms, e.g. RFC 4771 [22], to synchronize the ROC as SRTCP header explicitly carries the SRTCP packet index.
description: Secure Real-Time Transport Control Protocol (SRTCP) is a protocol that provides security services to RTCP, similar to how SRTP secures RTP. It ensures the integrity and confidentiality of RTCP control packets.
explanation: The text explicitly states SRTCP as a protocol that enhances the security of RTCP, aligning with the definition of a Protocol entity type.
section_title: 6.6.2.1A	Usage of SRTCP
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