j"1LAnZuoQdcKCkpDBKQMCgziGMoPC4VQUckM<div class="post"><div class="quoteheader"><a href="https://bitcointalk.org/index.php?topic=30.msg1161#msg1161">Quote from: DataWraith on May 19, 2010, 07:52:42 PM</a></div><div class="quote">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.<br/></div>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.</div> text/html
https://whatsonchain.com/tx/52e40dba92c517ab6e1ac4e6da984a5da20a1d5900bb0dbb23c94c52278e0ab9