[147573] in cryptography@c2.net mail archive
Re: [Cryptography] Elliptic curve question
daemon@ATHENA.MIT.EDU (James A. Donald)
Wed Oct 9 16:21:41 2013
X-Original-To: cryptography@metzdowd.com
Date: Wed, 09 Oct 2013 06:14:49 +1000
From: "James A. Donald" <jamesd@echeque.com>
To: cryptography@metzdowd.com
In-Reply-To: <CAMm+Lwj4DED8Kx9-Oh1w-VoO=SDsJhARk02OFdPHuorK=LqxUw@mail.gmail.com>
Reply-To: jamesd@echeque.com
Errors-To: cryptography-bounces+crypto.discuss=bloom-picayune.mit.edu@metzdowd.com
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On 2013-10-08 03:14, Phillip Hallam-Baker wrote:
>
> Are you planning to publish your signing key or your decryption key?
>
> Use of a key for one makes the other incompatible.�
Incorrect. One's public key is always an elliptic point, one's private
key is always a number.
Thus there is no reason in principle why one cannot use the same key (a
number) for signing the messages you send, and decrypting the messages
you receive.
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<div class="moz-cite-prefix">On 2013-10-08 03:14, Phillip
Hallam-Baker wrote:<br>
</div>
<blockquote
cite="mid:CAMm+Lwj4DED8Kx9-Oh1w-VoO=SDsJhARk02OFdPHuorK=LqxUw@mail.gmail.com"
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<div class="gmail_quote"><br>
<div>Are you planning to publish your signing key or your
decryption key?</div>
<div><br>
</div>
<div>Use of a key for one makes the other incompatible.�<br>
</div>
</div>
</div>
</div>
</blockquote>
<br>
Incorrect. One's public key is always an elliptic point, one's
private key is always a number. <br>
<br>
Thus there is no reason in principle why one cannot use the same key
(a number) for signing the messages you send, and decrypting the
messages you receive.<br>
<br>
<br>
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