A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Security Maintenance and Extensions WG of
the IETF.
Title : Implicit IV for Counter-based Ciphers in
Encapsulating Security Payload (ESP)
Authors : Daniel Migault
Tobias Guggemos
Yoav Nir
Filename : draft-ietf-ipsecme-implicit-iv-08.txt
Pages : 8
Date : 2019-10-16
Abstract:
Encapsulating Security Payload (ESP) sends an initialization vector
(IV) in each packet. The size of IV depends on the applied
transform, being usually 8 or 16 octets for the transforms defined by
the time this document is written. Some algorithms such as AES-GCM,
AES-CCM and ChaCha20-Poly1305 when used with IPsec, take the IV to
generate a nonce that is used as an input parameter for encrypting
and decrypting. These algorithms require a unique IV but do not
require an unpredictable IV. As a result, the value provided in the
ESP Sequence Number (SN) can be used instead to generate the nonce.
This avoids sending the IV itself, and saves in the case of AES-GCM,
AES-CCM and ChaCha20-Poly1305 8 octets per packet. This document
describes how to do this.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ipsecme-implicit-iv/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-ipsecme-implicit-iv-08
https://datatracker.ietf.org/doc/html/draft-ietf-ipsecme-implicit-iv-08
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ipsecme-implicit-iv-08
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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