RFC 4322

Opportunistic Encryption using the Internet Key Exchange (IKE), December 2005

File formats:
icon for text file icon for PDF icon for HTML icon for inline errata
M. Richardson
D.H. Redelmeier

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC4322

Discuss this RFC: Send questions or comments to the mailing list iesg@ietf.org

Other actions: View Errata  |  Submit Errata  |  Find IPR Disclosures from the IETF  |  View History of RFC 4322


This document describes opportunistic encryption (OE) as designed and implemented by the Linux FreeS/WAN project. OE uses the Internet Key Exchange (IKE) and IPsec protocols. The objective is to allow encryption for secure communication without any pre-arrangement specific to the pair of systems involved. DNS is used to distribute the public keys of each system involved. This is resistant to passive attacks. The use of DNS Security (DNSSEC) secures this system against active attackers as well.

As a result, the administrative overhead is reduced from the square of the number of systems to a linear dependence, and it becomes possible to make secure communication the default even when the partner is not known in advance. This memo provides information for the Internet community.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

Advanced Search