The IAB is ready to ask the RFC-Editor to publish Security Mechanisms for the Internet draft-iab-secmech-02.txt as an Informational RFC. This document is part survey of issues, and part advice for IETF protocol development. The IAB would like to ensure that the IETF community has had an opportunity to read it and comment before its publication. The IAB solicits comments by March 28, 2003. Please send comments to the IAB (iab@iab.org), care of the document editor (Charlie_Kaufman@notesdev.ibm.com), or to ietf@ietf.org. The document can be found at http://www.ietf.org/internet-drafts/draft-iab-secmech-02.txt Abstract Security must be built into Internet Protocols for those protocols to offer their services securely. Many security problems can be traced to improper implementations. However, even a proper implementation will have security problems if the fundamental protocol is itself exploitable. Exactly how security should be implemented in a protocol will vary, because of the structure of the protocol itself. However, there are many protocols for which standard Internet security mechanisms, already developed, may be applicable. The precise one that is appropriate in any given situation can vary. We review a number of different choices, explaining the properties of each. Leslie Daigle For the IAB