RFC 2779 (rfc2779) - Page 2 of 26


Instant Messaging / Presence Protocol Requirements



Alternative Format: Original Text Document



RFC 2779          Instant Messaging/Presence Protocol      February 2000


Table of Contents

   1. Terminology...................................................  3
   2. Shared Requirements...........................................  4
    2.1. Namespace and Administration...............................  5
    2.2. Scalability................................................  5
    2.3. Access Control.............................................  6
    2.4. Network Topology...........................................  6
    2.5. Message Encryption and Authentication......................  7
   3. Additional Requirements for PRESENCE INFORMATION..............  7
    3.1. Common Presence Format.....................................  7
    3.2. Presence Lookup and Notification...........................  8
    3.3. Presence Caching and Replication...........................  8
    3.4. Performance................................................  9
   4. Additional Requirements for INSTANT MESSAGES..................  9
    4.1. Common Message Format......................................  9
    4.2. Reliability................................................ 10
    4.3. Performance................................................ 10
    4.4. Presence Format............................................ 10
   5. Security Considerations....................................... 11
    5.1. Requirements related to SUBSCRIPTIONS...................... 11
    5.2. Requirements related to NOTIFICATION....................... 12
    5.3. Requirements related to receiving a NOTIFICATION........... 13
    5.4. Requirements related to INSTANT MESSAGES................... 13
   6. References.................................................... 14
   7. Authors' Addresses............................................ 15
   8. Appendix: Security Expectations and Deriving Requirements..... 16
    8.1. Presence Information....................................... 16
     8.1.1. Subscription............................................ 16
     8.1.2. Publication............................................. 19
     8.1.3. Publication for Notification............................ 19
     8.1.4. Receiving a Notification................................ 20
    8.2. Instant Messaging.......................................... 21
     8.2.1. Named Instant Messaging................................. 21
     8.2.2. Anonymous Instant Messaging............................. 23
     8.2.3. Administrator Expectations.............................. 24
   Full Copyright Statement......................................... 26














Day, et al.                  Informational