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Re: [Cfrg] Safecurves draft

Bodo Moeller <bmoeller@acm.org> Thu, 09 January 2014 21:29 UTC

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References: <20140109031144.6111382.52184.8264@certicom.com> <20140109094731.GA12327@netbook.cypherspace.org> <CADMpkc+giuSZgrYmusRJmj5SyN9Dcu_Mdaqx5KQPyXGMmosFUw@mail.gmail.com> <CABqy+soXxjY+fEzpHP+_yn9Y1Xtapm_9OWbgDcA_J_Lukz_YLw@mail.gmail.com> <CADMpkcJFk2C5DPQX9RVWphUH25atsUX2vPA7RwNf8zbmR6dXJQ@mail.gmail.com> <CABqy+soX0xVWG0+vJs-_7O1Ur_hkDW0u0acCGZYrrtEci5QRXw@mail.gmail.com> <CADMpkcKptQrtXyaarkXiMpRyGmobEcywbTeTkkcb6uWB-yttwg@mail.gmail.com> <B29AD107-69D0-4EF5-9D5B-137C1E333AEA@shiftleft.org> <CACsn0ckufy9jfOXcMDA7WE+SzZUuuibucod8CkQeACnQam63-w@mail.gmail.com> <CEF43F31.2BF71%paul@marvell.com> <CACsn0c=wfpmQRL5axi0T-eB-M=+sxni54t8EjQK7ZbdU9eW8kg@mail.gmail.com>
Date: Thu, 09 Jan 2014 22:29:36 +0100
Message-ID: <CADMpkcJKGSt7pzhd2HmR6yHo1fc_O8i2mYbOkV-vbt-DDM=hLA@mail.gmail.com>
From: Bodo Moeller <bmoeller@acm.org>
To: Watson Ladd <watsonbladd@gmail.com>
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Cc: "cfrg@irtf.org" <cfrg@irtf.org>
Subject: Re: [Cfrg] Safecurves draft
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Watson Ladd <watsonbladd@gmail.com>:

Furthermore, some people (like me) want fixed length encodings sized
> to cover the necessary range exactly, while
> others like ASN.1 (for inexplicable reasons).


With ASN.1, you'd normally see a fixed-length OCTET STRING for this.  I
doubt that anyone seriously prefers variable-length encodings here.



> The fewer choices we
> make here, the faster this can get through.


What's gained, though?  The same decisions would have to be made, instead,
for each protocol that is going to use one of these curves.

Bodo

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