---
layout: forum
title: 'Re: We accept Bitcoins'
grand_parent: Forum Posts
parent: Bitcoin Forum
nav_order: 102
date: 2010-05-20 21:43:42 UTC
original: https://bitcointalk.org/index.php?topic=30.msg1169#msg1169
---

# Re: We accept Bitcoins
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<code>Re: We accept Bitcoins
May 20, 2010, 09:43:42 PM

<a href="https://bitcointalk.org/index.php?topic=60.msg439#msg439">Quote from: Xunie on February 23, 2010, 12:28:27 PM</a>
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Can I just butt in with a question on why that is? To me it seems that if Bitcoin uses public-key cryptography to transfer ownership of the coins, it should be a trivial matter to include a short message that is only readable by the recipient.
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Almost but not quite.  Bitcoin uses EC-DSA, which can only do digital signing, not encryption.  RSA can do both, but I didn't use it because it's an order of magnitude bigger and would have been impractical.

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