'Purported White-Hat Hackers' Withdraw $320M in Bitcoin From Liquid

60-second summary
Blockstream reports that a group claiming to be white‑hat hackers has moved roughly $320 million in Bitcoin from the Liquid sidechain, using PGP‑signed messages embedded in transactions to communicate with the company. The withdrawal highlights ongoing security challenges for confidential settlement layers, prompting market participants to scrutinize liquidity‑risk controls and potentially tightening compliance standards across the crypto‑exchange ecosystem.
Blockstream and the hackers are engaging with each other through PGP-signed messages in Bitcoin transactions.