SHA 256

Blockstream researchers have introduced SHRINCS, a proposed Bitcoin signature method designed to resist future quantum attacks while limiting pressure on block space. The draft remains early, with a pending security proof, non-production reference software, and a path to Bitcoin that would require a soft fork and broad network support.

Coinkite has released new Coldcard firmware after a randomness flaw enabled attackers to steal more than $114 million in bitcoin. The company says AI-assisted review found additional issues, but users with affected seeds still need to create new wallets and migrate funds.