Hi Ketan, The patent that was granted was for the idea in the optimizing authentication draft. The initial draft proposed having strong authentication for state transitions that affected a BFD session but switching to “NULL” auth once the BFD session was marked Up, with occasional strong authentication in the Up state to mitigate any man-in-the-middle attack. The latest version kept the strong authentication concept for state transitions but did away with “NULL” auth option. Instead, it relies on ISAAC+ to provide a less computationally intensive way to validate the sequence numbers being carried in the packet in Up state.
I am not a lawyer, but the new method described in the draft seems sufficiently different from what the patent claimed. I know Reshad was going on vacation, so I will not be surprised if you do not hear from him for the next 12 days. Cheers. > On May 8, 2025, at 1:39 AM, Ketan Talaulikar <[email protected]> wrote: > > Hi Mahesh, > > Thanks for your email and I would like to request further clarification from > you on this as you are listed as one of the inventors in the IPR that was > disclosed. > > Is your position today that IPR declared does not apply to the latest version > of the draft (as it stands today)? > > This may clarify the situation during further progression of this document as > the shepherd report does disclose a "controversy" [1] related to the IPR > terms on this document. > > I would request the shepherding co-chair (Reshad) to update the shepherd > report based on your response, in case of a change in position. > > Thanks, > Ketan > > [1] > https://mailarchive.ietf.org/arch/msg/rtg-bfd/u8rvWwvDWRKI3jseGHecAB9WtDo/ > <https://mailarchive.ietf.org/arch/msg/rtg-bfd/u8rvWwvDWRKI3jseGHecAB9WtDo/> > On Thu, May 8, 2025 at 9:53 AM Mahesh Jethanandani <[email protected] > <mailto:[email protected]>> wrote: > Hi Reshad, > > Just one correction. There is an IPR that was declared and filed for the > optimizing-authentication draft back in 2018. The draft now, though, > significantly diverges from the patent that was filed. > > Thanks. > >> On May 6, 2025, at 12:13 PM, Rahman <[email protected] >> <mailto:[email protected]>> wrote: >> >> The WGLC has concluded and the shepherd write ups have been updated. The >> documents have been pushed to the next phase. >> >> It’s not over yet but thanks to everyone who has helped to get the documents >> past this milestone. It’s been a loooong journey and there’s more work to be >> done to get to the finish line. >> >> Regards, >> Reshad. >> >> Sent from my iPhone >> >>> On Mar 4, 2025, at 5:27 AM, Reshad Rahman >>> <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> >>> I am not aware of any IPR on these 3 documents. >>> >>> Regards, >>> Reshad, >>> >>> On Tuesday, March 4, 2025 at 10:51:59 AM GMT+4, Reshad Rahman >>> <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> >>> My IPR check request incorrectly addressed only authors. It should instead >>> have said (no need to re-respond if you already have): >>> >>> Authors, contributors, >>> >>> Are you personally aware of any IPR that applies to any of these 3 >>> documents? If so, has this IPR been disclosed in >>> compliance with IETF IPR rules? (See RFCs 3979, 4879, 3669, and 5378 for >>> more details.) >>> >>> Please reply to this email regardless of whether or not you are personally >>> aware of any relevant IPR. >>> >>> Regards, >>> Reshad. >>> >>> On Tuesday, June 4, 2024 at 05:30:18 AM GMT+4, Reshad Rahman >>> <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> >>> BFD WG, >>> >>> This email starts a 2 week Working Group Last Call for the following 3 >>> documents, please review and provide comments by end of day on June 17th. >>> Feedback such as "I believe the document is ready to advance" is also >>> welcome. >>> >>> https://datatracker.ietf.org/doc/draft-ietf-bfd-secure-sequence-numbers/ >>> <https://datatracker.ietf.org/doc/draft-ietf-bfd-secure-sequence-numbers/> >>> >>> https://datatracker.ietf.org/doc/draft-ietf-bfd-optimizing-authentication/ >>> <https://datatracker.ietf.org/doc/draft-ietf-bfd-optimizing-authentication/> >>> >>> https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ >>> <https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/> >>> >>> >>> Those documents were discussed extensively a few years ago but there have >>> been a few changes since (e.g. use of ISAAC). >>> >>> IPR check was done a few years ago but it's been a while and there has been >>> significant changes in the documents since then: >>> 1- Authors, please respond whether you are aware of any undisclosed IPR. >>> 2- Mahesh, Ankur and Ashesh, is this IPR >>> <https://datatracker.ietf.org/ipr/3328/> still relevant/applicable to >>> draft-ietf-bfd-optimizing-authentication? >>> >>> >>> Regards, >>> Reshad. >>> >>> >>> >>> > > Mahesh Jethanandani > [email protected] <mailto:[email protected]> > > > Mahesh Jethanandani [email protected]
