Re: [Cfrg] Point format endian
"Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com> Mon, 19 January 2015 13:09 UTC
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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: Alyssa Rowan <akr@akr.io>, Alexey Melnikov <alexey.melnikov@isode.com>, "cfrg@irtf.org" <cfrg@irtf.org>
Thread-Topic: [Cfrg] Point format endian
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Date: Mon, 19 Jan 2015 13:09:20 +0000
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Subject: Re: [Cfrg] Point format endian
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I managed to pick the wrong posting to followup, hence the wrong reference in header (now removed). That's fine, I wanted to be clear if this was deliberate. It's not without cost, but nothing is. -- Christopher Dearlove Senior Principal Engineer, Information Assurance Group Communications, Networks and Image Analysis Capability BAE Systems Advanced Technology Centre West Hanningfield Road, Great Baddow, Chelmsford, CM2 8HN, UK Tel: +44 1245 242194 | Fax: +44 1245 242124 chris.dearlove@baesystems.com | http://www.baesystems.com BAE Systems (Operations) Limited Registered Office: Warwick House, PO Box 87, Farnborough Aerospace Centre, Farnborough, Hants, GU14 6YU, UK Registered in England & Wales No: 1996687 -----Original Message----- From: Alyssa Rowan [mailto:akr@akr.io] Sent: 19 January 2015 12:27 To: Dearlove, Christopher (UK); Alexey Melnikov; cfrg@irtf.org Subject: Re: [Cfrg] Point format endian (was: Adoption of draft-ladd-spake2 as a RG document) ----------------------! WARNING ! ---------------------- This message originates from outside our organisation, either from an external partner or from the internet. Consider carefully whether you should click on any links, open any attachments or reply. Follow the 'Report Suspicious Emails' link on IT matters for instructions on reporting suspicious email messages. -------------------------------------------------------- -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 19 January 2015 11:56:27 GMT+00:00, "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com> wrote: > […] Is the use of little endian format here a deliberate design decision? Probably yes, to match every existing implementation of Curve25519 already in the wild (and most commonly-used architectures)? TLS WG give new curves free reign on point format, explicitly not SEC1 constrained. They preferred little endian (weakly) for the above reason, I believe? - -- /akr -----BEGIN PGP SIGNATURE----- Version: APG v1.1.1 iQI3BAEBCgAhBQJUvPgjGhxBbHlzc2EgUm93YW4gPGFrckBha3IuaW8+AAoJEOyE jtkWi2t6zMYP/1zfZqPArx93uuddYNhL3FoApKh8rUmpJydhlVfAenxK7pfT7FjC 17g2xFE5dHdA+RZEduf4YDqvQHN8DUWFe9v/pQtq/ev6Ety66CsBG1PV/sQ2hF7f 474TKgp9S5ADndNttzD+AZx7JG1xiwvPoXp5BtY86R8tPNG+sfnOB+4Vxl9F7XPC Cboi942fAlO4F5WxFxJhb8ZY0O9B0MDtfKZVg3SEkyZq+moGGjVwndlcBa26e5+S iKQeyEXl1yGthSt3Pp7WGFnhu86Ul6/2cC1FmlmOTpXu8RRW3idvwF8Au5VJaJ5s JEYRAN1FrT9U6Bdrjfs5VZHeQkhSK0jzRlnRFD2VsyBClRwmFDmuODiqJoWkiYHX qTuZOwvyyqLFgAXgwm+uovTkIjrgKWam66G2ptAUacV3cqhiX0/VdGJIk+Hw2xTd C95oSiIMw5vHQWuUWvCVh4s7G2kf5+nf930c3MRm4q1IdlFihvjVuLTP0uS8YMgb 5EI/kpCEso6d3foVUTkTbLbe9rXm1AJtL9N7QJ1KdKGXtsHmhMkFjPijE1B3qvB4 aRzjEGoVV48j3yxM68SjyV38TgqvMwzi2qmoXZGeBocynIq+jT05F+d8K3ibUCgV 2ZrKaWIinQs4JQ5Meu3UE0IMcpBQQ0/YE/XE4Y6AUWjyde/mR6nHE+F5 =RTzy -----END PGP SIGNATURE----- ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ********************************************************************
- Re: [Cfrg] Point format endian Dearlove, Christopher (UK)
- Re: [Cfrg] Point format endian Dearlove, Christopher (UK)