
Security Parameters Index (SPI) Parameters

(last updated 2009-05-20)

Registries included below:
- Security Parameters Index (SPI)


Registry Name: Security Parameters Index (SPI)
Reference: [RFC1826]
Registration Procedures: RFC required

Note:
The Security Parameters Index is a 32-bit number used to identify the
security association of a datagram in certain security procedures
[RFC1826][RFC1827].  The first 256 SPI values are assigned by the IANA
and listed here.

Registry:
Number    Description                                          Reference
--------  ---------------------------------------------------  ---------
0         Reserved  - Used to indicate that no security
                      association has been established         [RFC4302][RFC4303]
1         SKIP                                                 [Markson]
2-255     Unassigned


Reference
---------
[RFC1826]  Atkinson, R., "IP Authentication Header", RFC 1826, Naval
           Research Laboratory, August 1995.

[RFC1827]  Atkinson, R., "IP Encapsulating Security Payload (ESP)",
           RFC 1827, Naval Research Laboratory, August 1995.

[RFC4302]  S. Kent, "IP Authentication Header", RFC 4302, December 2005.

[RFC4303]  S. Kent, "IP Encapsulating Security Payload (ESP)", 
           RFC 4303, December 2005.


People
---------
[Markson]  Tom Markson, <markson&osmosys.incog.com>, August 1995.



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