History
- 19 February 1996 – Eric Baize and Denis Pinkas publish the Internet Draft Simple GSS-API Negotiation Mechanism (draft-ietf-cat-snego-01.txt).
- 17 October 1996 – The mechanism is assigned the object identifier 1.3.6.1.5.5.2 and is abbreviated snego.
- 25 March 1997 – Optimistic piggybacking of one mechanism's initial token is added. This saves a round trip.
- 22 April 1997 – The "preferred" mechanism concept is introduced. The draft standard's name is changed from just "Simple" to "Simple and Protected" (spnego).
- 16 May 1997 – Context flags are added (delegation, mutual auth, etc.). Defenses are provided against attacks on the new "preferred" mechanism.
- 22 July 1997 – More context flags are added (integrity and confidentiality).
- 18 November 1998 – The rules of selecting the common mechanism are relaxed. Mechanism preference is integrated into the mechanism list.
- 4 March 1998 – An optimisation is made for an odd number of exchanges. The mechanism list itself is made optional.
- Final December 1998 – DER encoding is chosen to disambiguate how the MIC is calculated. The draft is submitted for standardisation as RFC 2478.
- October 2005 – Interoperability with Microsoft implementations is addressed. Some constraints are improved and clarified and defects corrected. Published as RFC 4178, although it is now non-interoperable with strict implementations of now-obsoleted RFC 2478.
Read more about this topic: SPNEGO
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