name: MSRP
full_form: Message Session Relay Protocol
context: e.g. an enhanced version of S/MIME is needed. - For MSRP, the key management is not limited to half-round trip and can therefore include some negotiation. For TLS, the key management could be transferred in a SIP header. Some extra per-message information may also be needed in the MSRP body. For end-to-end security, the credentials for key management could be transferred in a MSRP header or in the MSRP body with an appropriate MIME type (e.g. application/mikey). - For session-based messaging conferencing, an end-to-end security solution may use a group key. As the architecture for session-based messaging conferencing and ordinary voice conferences are similar, they could eventually use similar security solutions. However, in contrast to voice, messages may typically not require mixing, i.e. there may be less need for cleartext media access by the conference server. - MSRP is also used for services like file transfer and image share. A solution for secure MSRP should therefore also
description: Message Session Relay Protocol (MSRP) is a protocol used for session-based messaging conferencing, enabling the exchange of messages between users in real-time. It facilitates features like file transfer and image sharing, and its security aspects are crucial for protecting user data.
explanation: The text explicitly states that MSRP is a protocol used for communication within session-based messaging conferencing. Protocols define the rules and standards for data transmission in telecommunications.
section_title: 8.1.2	Immediate security observations
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