Key reuse in Secure MIME for the Session Initiation Protocol(SIP)
draft-ono-sipping-smime-keyreuse-01
| Document | Type |
Expired Internet-Draft
(individual)
Expired & archived
|
|
|---|---|---|---|
| Authors | Shinya Tachimoto , Kumiko Ono | ||
| Last updated | 2005-07-20 | ||
| RFC stream | (None) | ||
| Intended RFC status | (None) | ||
| Formats | |||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
The SIP User Agent uses Secure MIME (S/MIME) Cryptographic Message Syntax (CMS) EnvelopedData to protect SIP messages for confidentiality. While SIP messages can be encrypted with different keying materials for each message in a dialog, it usually requires a public key operation for each message and the computational cost of such operations are relatively expensive. This draft proposes a method of bidirectional key exchange to reuse keying materials for S/MIME-secured messages in a dialog and use a symmetric key mechanism instead of an asymmetric key mechanism such as a public key operation. The proposed mechanism also achieves the sharing of keying material among multiple entities simply.
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)