{"id":317222,"date":"1999-09-01T12:00:03","date_gmt":"1999-09-01T19:00:03","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-research-item&p=317222"},"modified":"2020-11-10T07:52:18","modified_gmt":"2020-11-10T15:52:18","slug":"spki-certificate-theory","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/spki-certificate-theory\/","title":{"rendered":"SPKI Certificate Theory"},"content":{"rendered":"

The SPKI Working Group has developed a standard form for digital certificates whose main purpose is authorization rather than authentication.\u00a0 These structures bind either names or explicit authorizations to keys or other objects.\u00a0 The binding to a key can be directly to an explicit key, or indirectly through the hash of the key or a name for it.\u00a0 The name and authorization structures can be used separately or together.\u00a0 We use S-expressions as the standard format for these certificates and define a canonical form for those S-expressions.\u00a0 As part of this development, a mechanism for deriving authorization decisions from a mixture of certificate types was developed and is presented in this document.<\/p>\n

This document gives the theory behind SPKI certificates and ACLs without going into technical detail about those structures or their uses.<\/p>\n","protected":false},"excerpt":{"rendered":"

The SPKI Working Group has developed a standard form for digital certificates whose main purpose is authorization rather than authentication.\u00a0 These structures bind either names or explicit authorizations to keys or other objects.\u00a0 The binding to a key can be directly to an explicit key, or indirectly through the hash of the key or a 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