[Sip] I-D ACTION:draft-ietf-sip-sec-agree-01.txt
Internet-Drafts@ietf.org Tue, 14 May 2002 22:40 UTC
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Subject: [Sip] I-D ACTION:draft-ietf-sip-sec-agree-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Session Initiation Protocol Working Group of the IETF. Title : Security Mechanism Agreement for SIP Sessions Author(s) : J. Arkko et al. Filename : draft-ietf-sip-sec-agree-01.txt Pages : 16 Date : 13-May-02 SIP has a number of security mechanisms. Some of them have been built in to the SIP protocol, such as HTTP authentication or secure attachments. These mechanisms have even alternative algorithms and parameters. SIP does not currently provide any mechanism for selecting which security mechanisms to use over a connection. In particular, even if some mechanisms such as OPTIONS were used to make this selection, the selection would be vulnerable against the Bidding-Down attack. This document defines three header fields for negotiating the security mechanisms within SIP between a user agent client and its next hop SIP entity. A SIP entity applying this mechanism must always require some minimum security (i.e. integrity protection) from all communicating parties in order to secure the negotiation, but the negotiation can agree on which specific minimum security is used. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-sip-sec-agree-01.txt To remove yourself from the IETF Announcement list, send a message to ietf-announce-request with the word unsubscribe in the body of the message. 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-sip-sec-agree-01.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: mailserv@ietf.org. In the body type: "FILE /internet-drafts/draft-ietf-sip-sec-agree-01.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.
- [Sip] I-D ACTION:draft-ietf-sip-sec-agree-01.txt Internet-Drafts