[147557] in cryptography@c2.net mail archive
Re: [Cryptography] Elliptic curve question
daemon@ATHENA.MIT.EDU (Phillip Hallam-Baker)
Mon Oct 7 13:57:10 2013
X-Original-To: cryptography@metzdowd.com
In-Reply-To: <CAJFxiS8aXAcuR4upk0QxRSO8mUaiW96kDu4Bg8MCz4Gcojppng@mail.gmail.com>
Date: Mon, 7 Oct 2013 13:14:45 -0400
From: Phillip Hallam-Baker <hallam@gmail.com>
To: =?ISO-8859-1?Q?Lay_Andr=E1s?= <andras@lay.hu>
Cc: "cryptography@metzdowd.com" <cryptography@metzdowd.com>
Errors-To: cryptography-bounces+crypto.discuss=bloom-picayune.mit.edu@metzdowd.com
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On Mon, Oct 7, 2013 at 4:54 AM, Lay Andr=E1s <andras@lay.hu> wrote:
> Hi!
>
> I made a simple elliptic curve utility in command line PHP:
>
> https://github.com/LaySoft/ecc_phgp
>
> I know in the RSA, the sign is inverse operation of encrypt, so two
> different keypairs needs for encrypt and sign. In elliptic curve
> cryptography, the sign is not the inverse operation of encrypt, so my
> application use same keypair for encrypt and sign.
>
> Is this correct?
>
Are you planning to publish your signing key or your decryption key?
Use of a key for one makes the other incompatible.
--=20
Website: http://hallambaker.com/
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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Mon, Oct 7, 2013 at 4:54 AM, Lay Andr=E1s <span dir=3D"ltr"><=
<a href=3D"mailto:andras@lay.hu" target=3D"_blank">andras@lay.hu</a>></s=
pan> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hi!<br>
<br>
I made a simple elliptic curve utility in command line PHP:<br>
<br>
<a href=3D"https://github.com/LaySoft/ecc_phgp" target=3D"_blank">https://g=
ithub.com/LaySoft/ecc_phgp</a><br>
<br>
I know in the RSA, the sign is inverse operation of encrypt, so two<br>
different keypairs needs for encrypt and sign. In elliptic curve<br>
cryptography, the sign is not the inverse operation of encrypt, so my<br>
application use same keypair for encrypt and sign.<br>
<br>
Is this correct?<br></blockquote><div><br></div><div>Are you planning to pu=
blish your signing key or your decryption key?</div><div><br></div><div>Use=
of a key for one makes the other incompatible.=A0<br></div></div><div><br>
</div>-- <br>Website: <a href=3D"http://hallambaker.com/">http://hallambake=
r.com/</a><br>
</div></div>
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