BTQ’s Bitcoin Quantum Testnet and “Old BTC” Risk, Explained

Jan 19, 2026 - 17:00
BTQ’s Bitcoin Quantum Testnet and “Old BTC” Risk, Explained
Key takeaways Bitcoin’s quantum risk centers on exposed public keys and signature security. BTQ’s testnet explores post-quantum signatures in a Bitcoin-like environment. Post-quantum signatures significantly increase transaction size and block space demands. “Old BTC risk” is concentrated in legacy output types and address reuse patterns. BTQ Technologies said it had launched a Bitcoin Quantum testnet...

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