A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : TLS Client Puzzles Extension
Author : Erik Nygren
Filename : draft-nygren-tls-client-puzzles-00.txt
Pages : 12
Date : 2015-07-02
Abstract:
Client puzzles allow a TLS server to defend itself against asymmetric
DDoS attacks. In particular, it allows a server to request clients
perform a selected amount of computation prior to the server
performing expensive cryptographic operations. This allows servers
to employ a layered defense that represents an improvement over pure
rate-limiting strategies.
Client puzzles are implemented as an extension to TLS 1.3
[I-D.ietf-tls-tls13] wherein a server can issue a HelloRetryRequest
containing the puzzle as an extension. The client must then resend
its ClientHello with the puzzle results in the extension.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-nygren-tls-client-puzzles/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-nygren-tls-client-puzzles-00
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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