Protocols/MSNP/General/Overview

MSN Protocol Version 8 introduced us to Microsoft's 'secure' authentication schema. From a technical standpoint the MD5 method that was used in MSNP7 was completely secure even from man in the middle attacks but Microsoft decided that it would be beneficial to MSN Messenger to authenticate directly with the passport servers, and Protocols/MSNP/Tweener was born.

After MSNP8, other, newer protocol versions were released (MSNP9, MSNP10, MSNP11, MSNP12 and currently MSNP13 for WLM). Most of the times the protocols introduced a more effecient way of storing contact lists and other properties, but also added new features as new clients were released to the public by the MSN Messenger team.

• MSN Messenger
  • 4.7, 5: MSNP8
  • 6.0: MSNP9
  • 6.1: MSNP9, MSNP10
  • 6.2: MSNP9, MSNP10, MSNP11
  • 7.0: MSNP11
  • 7.5: MSNP11, MSNP12
• Windows Live Messenger
  • 8.0: MSNP13