Video Demonstrates Double Spending Possibility in Bitcoin Cash SV ‘0-Conf’ Transactions

Bitcoin Cash SV (BSV), a new fork of Bitcoin Cash (BTC), faced new controversy on Dec. 8 after a researcher reportedly showed how any user could spend the same coins twice on its network in a “0-conf transaction.”

Bitcoin Cash, which was created in a hard fork from Bitcoin (BTC) in August 2017, uses 0-conf (or zero-conf) to allow almost instant transactions, meaning they are almost always confirmed in the following block.

In a multi-phase test including a video demonstration posted to Vimeo, the user, known as “reizu,” succeeded in “double spending” BSV tokens in a “0-conf transaction,” demonstrating the network’s vulnerability to attack and disproving major proponent Craig Wright’s claims (in reference to BCH) that “only miners” could do so.

The double spending demonstration was filmed with POP!, a point of sale (PoS) retail application that includes double spending detection.

“I’ve done many double-spending on the Bitcoin SV network,” reizu wrote in a…