Re: [Cfrg] On curves
Alyssa Rowan <akr@akr.io> Thu, 03 July 2014 06:31 UTC
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Date: Thu, 03 Jul 2014 07:31:51 +0100
From: Alyssa Rowan <akr@akr.io>
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Subject: Re: [Cfrg] On curves
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 03/07/2014 04:35, Watson Ladd wrote: > Yes, and I think we should change some choices. Adding point > compression with a separate sign bit is not that tricky, but I > can't remember when the patent expires. US6141420 (Certicom: Vanstone-Mullin-Agnew) has a priority date of 1994-07-29, so (to my understanding, and I believe djb's?) expires 2014-07-29 - a little under 4 weeks from now! Fortuitous timing, and I'm definitely not a patent expert, so I don't feel comfortable stating that for sure, and I don't know if there are any others that would be relevant to Edwards curve point compression. Employees of Certicom on this list: could you please check - is that correct? Are you aware of any other patents covering point compression with one sign bit? [I'm aware you've been slow on IPR issues recently due to internal issues, but you -do- have a duty to disclose anything that may pertain in a reasonable timeframe.] - -- /akr -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJTtPjXAAoJEOyEjtkWi2t6i8wP/RhlELJUC0u12POp40W7jfbr KcacekoivVs/FPVMsvXhnYGSz6IcGR4vLiWYnCRTuc49wXEhsUT8bWvHlabsKzlK yShH1HIHM97qp14WhAQ4wXIR93MuJqO+V+3BIQg0AxmTxJKyvIbHg25NLRF4WiXM vbLQFiyDYLcWLH6pPZUxv8WjjWWEL4nFsBXGKEcDeu6JZI44mzaHF1IL1oxRguCu ua6NKZt720zxFEU6OtxpaykTnsfemusrmf5YKvuh4FEHgMWTld8X/MjsAjnPoUv3 ec7Y3OnMuoweVzRns58JDjoe1Mq4pu9JSF30kzMmhDMXXPe5o1FdY8RCmXgB43XY svB54H0gb1KiQvmF2ZoLJZBIGYIoDlLwRQpgt3yorG9vK7HDuOSwA1OR6EnLtPOj jwlMxyQrT6trISx73Sr7hTAmT42URDTuGV6l6jYHVHJmyMDOn7hdCSxpCiKgapKE 2JvQzWlSNVYUHQvm0Z8rumegqdzpU+BZrKaWOZk+Y/dEmPfWHO9ZJyL7pU37mSoL JeUSn0Td84szEQer24Ecy7fDylhP5awPsJS46pT2BD+aDTKqA5PLhiadarj4wtqv FrvwjYNM3EMl1Xm3EPaHcdkCRy5RwVV/7TbAsTOxFCvpeKF5/4him7VNkRVak5Qu NL9PWC0/FD+GMHOqUuzW =lS/c -----END PGP SIGNATURE-----
- [Cfrg] On curves Watson Ladd
- Re: [Cfrg] On curves Michael Hamburg
- Re: [Cfrg] On curves Watson Ladd
- Re: [Cfrg] On curves Tony Arcieri
- Re: [Cfrg] On curves Alyssa Rowan