Re: We accept Bitcoins May 20, 2010, 09:43:42 PM Quote from: Xunie on February 23, 2010, 12:28:27 PM ------------- 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. ------------- 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.