Trusted Linker Download Redirection (TLDR)

Document Type Replaced Internet-Draft (individual)
Author Ben Kennish 
Last updated 2015-04-09 (latest revision 2014-10-05)
Replaced by draft-bennish-httpbis-tldr
Stream (None)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-bennish-httpbis-tldr
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes an HTTP extension that allows user agents to verify downloaded data. It provides a standardised way for an HTTPS URL (assumed trustworthy) to redirect to a non-HTTPS URL and give the user agent extra information about the resulting output (e.g. a downloaded file.) Once that is retrieved, it can check whether or not the data has been modified since the trustworthy site checked it (e.g. altered during transit or as a result of the destination site having been compromised.)


Ben Kennish (

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