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In computer networking, the Message Session Relay Protocol (MSRP) is a protocol for transmitting a series of related instant messages in the context of a communications session. An application instantiates the session with the Session Description Protocol (SDP) over Session Initiation Protocol (SIP) or other rendezvous methods.
The technology was initially developed by Goldman Sachs as an internal messaging system called Live Current. [1] In October 2014, Goldman Sachs and 14 other financial institutions invested $66 million to establish Symphony Communication Services LLC [2] and acquire Perzo, Inc., [3] a secure communication application known for its end-to-end encryption messaging.
It was used by AOL's AIM instant messaging system and ICQ. Despite its name, the specifications for the protocol remain proprietary. AOL has gone to great lengths to keep competitors (namely Microsoft , XMPP , and Cerulean Studios) from implementing compatible clients for their proprietary messaging systems.
Instant messaging systems facilitate connections between specified known users [1] (often using a contact list also known as a "buddy list" or "friend list") or in chat rooms, and can be standalone apps or integrated into a wider social media platform, or in a website where it can, for instance, be used for conversational commerce.
An enterprise messaging system (EMS) or messaging system in brief [1] is a set of published enterprise-wide standards that allows organizations to send semantically precise messages between computer systems. EMS systems promote loosely coupled architectures that allow changes in the formats of messages to have minimum impact on message subscribers.
Created at MIT as part of Project Athena, [1] Zephyr was designed as an instant messaging protocol and application-suite with a heavy Unix background. Using the "do one thing, do it well" philosophy of Unix, it was made up of several separate programs working together to make a complete messaging system.
IRC (Internet Relay Chat) is a text-based chat system for instant messaging. IRC is designed for group communication in discussion forums, called channels , [ 1 ] but also allows one-on-one communication via private messages [ 2 ] as well as chat and data transfer , [ 3 ] including file sharing .
SIP defines two modes of instant messaging: The Page Mode makes use of the SIP method MESSAGE, as defined in RFC 3428. This mode establishes no sessions. The Session Mode. The Message Session Relay Protocol (RFC 4975, RFC 4976) is a text-based protocol for exchanging arbitrarily-sized content between users, at any time. An MSRP session is set ...