Bitcoin developer warns of replay attack risk in potential BIP-110 fork

Bitcoin developer and Wizardsardine CEO Kevin Loaec warned that a BTC fork triggered by the BIP-110 proposal could expose users to replay attacks, potentially causing real BTC to be sent when they try to sell coins on the forked chain, CoinDesk reported. Loaec said both chains would accept the same transaction signatures immediately after a fork, and automatic replay protection would not apply. As a result, if a user signs a transaction to sell coins on the forked chain, a third party could submit the same transaction to Bitcoin’s main chain, causing the same amount of BTC to be transferred there as well. He added that ordinary investors who do not know how to safely split assets across the two chains should avoid any on-chain transactions during a fork period. "split" BIP-110 is a proposal to restrict the inclusion of non-payment data such as images and text in Bitcoin transactions. Activation requires support from more than 55% of the most recent 2,016 blocks, or 1,109 blocks, but current miner support is only around 2.6%, meaning the proposal has effectively failed to reach consensus. Even so, from block height 961,632, expected this weekend, BIP-110 nodes are designed to automatically reject blocks without that signal, raising the possibility that the Bitcoin chain could split in two if some nodes continue operating on a separate chain.