Y. Vanhullebus
Internet Draft                                             
Document: <draft-vanhu-secure-world-00.txt>                
Expires December 2009
                                                           June 2009


               Usage of the keyword SHOULD in RFCs to indicate
               requirement level


Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026 [1].
   This document specifies an Internet Best Current Practices for the
   Internet Community, and requests discussion and suggestions for
   improvements.  Distribution of this memo is unlimited.




1. Abstract

   RFC-2119 describes usage of some key words, so people should know
   how to use them when writing RFCs, and how to understand them when
   reading RFCs compliant with RFC-2119.

   After some years of usage, some updates to those best practices
   seems to be needed to enhance security level of protocols and of
   their implementations.

2. Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in
   this document are to be interpreted as described in RFC-2119 [2].


3. SHOULD

   To ensure implementers won't forget/misunderstand security
   considerations when not doing something designed as "SHOULD",
   "SHOULD" keyword MUST NOT be used anymore in any RFC.


4. SHOULD NOT

   To ensure implementers won't forget/misunderstand security
   considerations when not doing something designed as "SHOULD NOT",
   "SHOULD NOT" keyword MUST NOT be used anymore in any RFC.



5. Security Considerations




6. References


   [1]  Bradner, S., "The Internet Standards Process -- Revision 3",
        BCP 9, RFC 2026, October 1996.

   [2]  Bradner, S., "Key words for use in RFCs to Indicate Requirement
        Levels", BCP 14, RFC 2119, March 1997


7. Acknowledgments

   The authors would like to thank SSTIC team(s).


8. Author's Addresses

   Yvan Vanhullebus
   <vanhu@FreeBSD.org>


9. Expiration

    This draft expires December, 2009


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