Skip to main content

Cryptographic Hyperlinks

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Manu Sporny , Leonard Rosenthol
Last updated 2021-11-08 (Latest revision 2021-05-02)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


When using a hyperlink to fetch a resource from the Internet, it is often useful to know if the resource has changed since the data was published. Cryptographic hashes, such as SHA-256, are often used to determine if published data has changed in unexpected ways. Due to the nature of most hyperlinks, the cryptographic hash is often published separately from the link itself. This specification describes a data model and serialization formats for expressing cryptographically protected hyperlinks. The mechanisms described in the document enables a system to publish a hyperlink in a way that empowers a consuming application to determine if the resource associated with the hyperlink has changed in unexpected ways.


Manu Sporny
Leonard Rosenthol

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)