Only a half solution, but at least the BTC can be verified. Have them provide an address that they own, and have them sign a message with the signing key for that address. Now their BTC balance on the exchange is whatever is in that address. Obviously, that does nothing for fiat accountability, though.
-Craig On Sun, Mar 02, 2014 at 03:29:09AM +0200, s...@sky-ip.org wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi, > > I want to build a marketplace where users can exchange bitcoin for > fiat currencies without having to go through a centralized escrow or > exchanger (directly user-to-user). This can be done by bitcoin > multisign option (contracts) where 2 users can agree on a mediator and > proceed with a transaction. > > The problem is: if the users don't go through a centralized escrow or > exchanger and they don't add funds or add bitcoins to their accounts, > how can we verify the authenticity of sell or buy postings and build a > strong and accurate order book, without users being able to abuse it > by posting abusive sell or buy offers which will break the supply and > demand calculation for price determination. This is a real possible > vulnerability since it's not a centralized system and users do not > deposit funds in their accounts, you cannot verify if the user has or > doesn't have the bitcoins or the fiat currency. > > Any suggestions? > > > - -- > U. > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.17 (MingW32) > > iQEcBAEBAgAGBQJTEollAAoJEIN/pSyBJlsRo3UIALEKep1mK1RL5EqftvMVZVTZ > b1kUu1kxkznETvgv5da6QqOYMj3LF5QTDSAuuRCxyme98hRTITxpVxnFBWi+agLl > hNeJl6wlYqWLINe3oQff1HQDzfcw6BPzy2wRkQFNTjdQla6KjhJ3/lO5Q5Pgdno0 > rMpc3DCmhfAxRXl36tcn/4MLo4TeBR8OzxfpZo69K89q1Hd3+Wb3QGj2hf8vVMJP > HoRhgrUh78r8d24qAHpTu+qECY1DdhyTx1GPqgNT6lp7tA+2LhkjDlq4tThUtuuc > LZaI36ZrbgJv6P6PlmRQIb009sHQKxHBJVwkNXEG0DNbUF8Yw9zK67nEcsEUOIc= > =Cl2L > -----END PGP SIGNATURE----- > > ------------------------------------------------------------------------------ > Flow-based real-time traffic analytics software. Cisco certified tool. > Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer > Customize your own dashboards, set traffic alerts and generate reports. > Network behavioral analysis & security monitoring. All-in-one tool. > http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk > _______________________________________________ > bitcoin-list mailing list > bitcoin-list@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-list ------------------------------------------------------------------------------ Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis & security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk _______________________________________________ bitcoin-list mailing list bitcoin-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-list
