-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 24.04.2014 14:15, Mike Hearn wrote: > Beyond needing to double balances, what if the shop is selling me a > phone on contract? So the actual cost of the phone is lower than > the real price on the assumption of future revenue. Alice double > spends (aka steals) the phone, paying double the artifically lower > cost but still making a good saving. Bob does not end up with > "nothing", he ends up in the red.
Nearly every payment system in existence has this problem: you have to be able to enforce the contract out-of-band. The scenario you describe is no worse than a payment network with instant, secure confirmations because Alice could just as well refuse to make the second payment. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJTWUYdAAoJEBrvn3PsoRcmT28QAJNbxjLRPYvkIfizeHoAFRH2 pNfd9458/AECJ6muGAs+tYeDw9uhYMVPnbMLZOwzgPl8HE5NN9XbGjCpwpNzsEK4 a8zb5CsonBh+xBNgbx1CIjCNYYQLd2qmgxMVaH4R7VWS+DgVBjfKq5MnM0vdSNcw SSzb9dMEjgl1cOZa07CG4GuPwEUIFiCVygjYSrGP2E8qCepKvH+0webIXk7COqZK SyhTdhS+dsdgGW5Mm8cA8zIVPaWYXMo88kOq2S4fIs5HiWtnVXQ9ljJ4r2Py1SEO H3u4lMWc7Hu0PUW6b6K+uDQfyJtRNi0diJSswseA37v6BeQW4zYMNfL40AsnG+Fv MusJFtBqHzXKhAeE/zpwi5QWs/qHvRYlETifIMKMrQldssDJo15ed/M8wNCZRobv Q7K3XKOt228nUUP2FrZl1I4wGWwkBMpzP89t8HMrTZYV2EFWqE+lu9oXcEjz9k12 64UXiWXU0jRAhMiCAvQUL7fKaOb9TXfGPy+3+bZOAtKM5M582+0d94EObA67SBsm O4H5vLTwS041x1cndW0NDxDbtM+IAuu2Jorzqzcie3ld7cqsKAyDbSk3i1C7zQzG hvI6FxIy0n6GA9ciw8RM44Q4zPVxYQ4e/MMby9ko7otmL5HLlOCnOUmJ/JHn+QJG Z7MDRkKAslLUUEqzgQWb =HNO6 -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
