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I-D ACTION:draft-ietf-msec-tesla-intro-01.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.

	Title		: TESLA: Multicast Source Authentication Transform 
	Author(s)	: A. Perrig et al.
	Filename	: draft-ietf-msec-tesla-intro-01.txt
	Pages		: 13
	Date		: 2002-10-30
Data authentication is an important component for many applications,
for example audio and video Internet broadcasts, or data distribution
by satellite. This document introduces TESLA, a secure source authenˇ
tication mechanism for multicast or broadcast data streams. This docˇ
ument provides an algorithmic description of the scheme for informaˇ
tional purposes, and in particular, it is intended to assist in writˇ
ing standardizable and secure specifications for protocols based on
TESLA in different contexts.
The main deterrents so far for a data authentication mechanism for
multicast were the seemingly conflicting requirements: loss tolerˇ
ance, high efficiency, no per-receiver state at the sender. The probˇ
lem is particularly hard in settings with high packet loss rates and
where lost packets are not retransmitted, and where the receiver
wants to authenticate each packet it receives.
TESLA provides authentication of individual data packets, regardless
of the packet loss rate. In addition, TESLA features low overhead for

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