I-D ACTION:draft-ietf-pkix-time-stamp-14.txt

[[e-mail]]

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Public-Key Infrastructure (X.509) Working Group of the IETF.

	Title		: Internet X.509 Public Key Infrastructure Time Stamp 
                          Protocols (TSP)
	Author(s)	: C. Adams, P. Cain, D. Pinkas, R. Zuccherato
	Filename	: draft-ietf-pkix-time-stamp-14.txt
	Pages		: 26
	Date		: 06-Apr-01
	
A time stamping service supports assertions of proof that a datum 
existed before a particular time. This document describes the format 
of a request sent to a Time Stamping Authority (TSA) and of the 
response that is returned. It also establishes several security-
relevant requirements for TSA operation, with regards to processing 
requests to generate responses. A TSA may be operated as a Trusted 
Third Party (TTP) service, though other operational models may be 
appropriate, e.g. an organization might require a TSA for internal 
time stamping purposes. 

Non-repudiation services [ISONR] require the ability to establish the 
existence of data before specified times. This protocol may be used as 
a building block to support such services. An example of how to prove 
that a digital signature was generated during the validity period of 
a public key certificate is given in an annex.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-pkix-time-stamp-14.txt

Internet-Drafts are also available by anonymous FTP. Login with the username
"anonymous" and a password of your e-mail address. After logging in,
type "cd internet-drafts" and then
	"get draft-ietf-pkix-time-stamp-14.txt".

A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html 
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


Internet-Drafts can also be obtained by e-mail.

Send a message to:
	[e-mail].
In the body type:
	"FILE /internet-drafts/draft-ietf-pkix-time-stamp-14.txt".
	
NOTE:	The mail server at ietf.org can return the document in
	MIME-encoded form by using the "mpack" utility.  To use this
	feature, insert the command "ENCODING mime" before the "FILE"
	command.  To decode the response(s), you will need "munpack" or
	a MIME-compliant mail reader.  Different MIME-compliant mail readers
	exhibit different behavior, especially when dealing with
	"multipart" MIME messages (i.e. documents which have been split
	up into multiple messages), so check your local documentation on
	how to manipulate these messages.
		
		
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.

ftp://ftp.ietf.org/internet-drafts/draft-ietf-pkix-time-stamp-14.txt"><ftp://ftp.ietf.org/internet-drafts/draft-ietf-pkix-time-stamp-14.txt>