Blockstream launched a Bitcoin custody system for institutions on Friday, November 13, 2026, developed with the French technology group Thales. The system combines Thales hardware security modules with Blockstream’s secure multi-party computation technology, keeping private keys and their shares inside the hardware during signing. Each transaction requires cooperation among several parties, while no individual key share is sufficient to move funds. Designed for custodial banks, prime brokers and other institutions, it offers policy controls, segregated accounts, multisignature options and cryptographic audit trails. The launch accompanies the beta of Blockstream Enterprise’s custody and tokenization services, which opened to a select private client base in the third quarter of 2026.
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