This document will replace RFC 3664 (once it is approved). RFC 3664
defines a particular pseudo-random function based on a key and a
message; however, RFC 3664 inadvertently only allowed fixed-size keys
of 128 bits. This document allows keys of all sizes.
Working Group Summary
This document was discussed in the IPsec WG before it was shut down,
and it was further discussed and on the IPsec mailing list after the
IPsec WG was shut down. Suggestions lead to significant improvements
in the parts of the function.
The document was brought to the attention of the CFRG, which raised no
Two different implementers who already had RFC 3664 implementations
read the specification and were able to implement the changes
successfully and interoperably.
This document was reviewed by Russ Housley for the IESG.