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SPKI - Simple Public Key Infrastructure formats
The IETF Simple Public Key Infrastructure Working Group has defined a format for storing, transmitting and manipulating certificates to support security in a wide range of Internet applications which will require the use of public key certificates. For the definition of the SPKI format, please refer to [SPKI]. The format of SPKI objects is a simplified form of S-expression. An S-expression is a list enclosed in matching "(" and ")", similar to the recursive list data structure in of the LISP and Scheme programming languages.
A canonical S-expression is a unique representation of an S-expression which may contain arbitrary binary byte strings. For transport over a 7-bit channel, it may be base64 (see [RFC2045]) encoded.
The advanced S-expression format is a complexer form of an S-expression which is not necessarily unique. It is more suited for human reading than the canonical S-expression format.
Examples SPKI certificates can be found in [SPKI].
<URL:http://www.clark.net/pub/cme/html/spki.html> Home-page of the IETF SPKI working group. <URL:http://theory.lcs.mit.edu/~rivest/sexp.html> Home-page of the S-expression technology. Carl M. Ellison, SPKI Requirements, Internet draft, <URL:http://www.ietf.org/internet-drafts/internet-drafts/draft-ietf-spki-cert-req-02.txt>, 24 October 1998. [SPKI] Carl M. Ellison, Bill Frantz, Butler Lampson, Ron Rivest, Brian M. Thomas and Tatu Ylonen, Simple Public Key Certificate, Internet draft (expired), <URL:http://www.ietf.org/internet-drafts/internet-drafts/draft-ietf-spki-cert-structure-05.txt>, 13 March 1998. Carl M. Ellison, Bill Frantz, Butler Lampson, Ron Rivest, Brian M. Thomas and Tatu Ylonen, SPKI Certificate Theory, Internet draft, <URL:http://www.ietf.org/internet-drafts/internet-drafts/draft-ietf-spki-cert-theory-04.txt>, 17 November 1998. Carl M. Ellison, Bill Frantz, Butler Lampson, Ron Rivest, Brian M. Thomas and Tatu Ylonen, SPKI Examples, Internet draft (expired), <URL:http://www.ietf.org/internet-drafts/draft-ietf-spki-cert-examples-01.txt>, 10 March 1998. [RFC2045] N. Freed and N. Borenstein, Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies, 2 December 1996.
This man-page was written by J.H.M. Dassen (Ray) <jdassen@wi.LeidenUniv.nl>.