Hi Adrian, what I was referring to was protecting against preplay attacks - see section 8.4 of draft-brockners-proof-of-transit-02: https://tools.ietf.org/html/draft-brockners-proof-of-transit-02#section-8.4
To protect against pre-play, we suggest to leverage a part of the HMAC of a part of the packet which isn't modified as it traverses the network for the random number RND which serves as a unique identifier for the packet for POT. Regards, Frank -----Original Message----- From: Adrian Farrel [mailto:[email protected]] Sent: Dienstag, 15. November 2016 17:40 To: Frank Brockners (fbrockne) <[email protected]> Cc: [email protected]; [email protected] Subject: Random numbers and In-situ OAM Hi Frank, Thought I had possibly mis-heard in RTGWG, but heard you again in OPSAWG say something about "using part of a random number" . I just ran off to look at draft-brockners*.txt and searched "random". I see some discussion of random numbers that looks fine, but I don't see anything (which may be my eyesight :-) about taking part of a random number. Do you have a pointer or a quick explanation? (Or you can tell me that my hearing is impaired!) Thanks, Adrian _______________________________________________ rtgwg mailing list [email protected] https://www.ietf.org/mailman/listinfo/rtgwg
