Crypto Based Host Identifiers

Document Type Expired Internet-Draft (individual)
Last updated 2004-02-02
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Abstract This memo specifies a 64-bit crypto-based host identifier that can be used as an interface identifier in protocols that allow address agility, such as [ODT]. The cryptographic nature of the host identifier makes it possible to determine whether a correspondent is legitimately using said host identifier or not. The host identifiers can be used as regular interface identifiers in protocols that don't require an identifier that is separate from locators, or they can be expanded to 128-bit IPv6 address like values for use with protocols that do need such an identifier-only value.


Iljitsch van Beijnum (

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