The (also known as a one-confirmation attack) is a sophisticated form of double-spending in Bitcoin that exploits the way nodes handle "orphaned" blocks and transaction confirmations. It allows an attacker to trick a recipient (often an exchange) into accepting a transaction that will ultimately be invalidated. How the Vector76 Attack Works
: Once the attacker finds a block, they quickly send a second transaction—sending the same coins from Address A to the exchange's Address C—directly to the exchange's node. Bitcoin_Fake_Transaction_Vector76_attack_Full_V...
: The attacker connects to a well-connected node (like an exchange's node) and a mining pool. They mine a block containing a transaction that sends coins from Address A to Address B (both controlled by the attacker) but do not broadcast it immediately. The (also known as a one-confirmation attack) is