thequantuminsider.com
Nov 5, 2026
Bitcoin Cash Proposal Seeks Path to Quantum-Resistant Transactions
AI-summarised brief · reviewed before publication
Bitcoin Cash developers are evaluating CHIP‑2026‑06, a Cash Improvement Proposal that introduces an `OP_SIGHASH` opcode to support post‑quantum and hybrid signature schemes. The opcode exposes the transaction sighash already computed during verification, enabling smaller contracts and preserving existing address formats. Hybrid keys combine classical and post‑quantum algorithms, allowing secure migration without new output types. The proposal could lock in on November 15, 2026, with mainnet activation slated for May 15, 2027.
💡 Why It Matters
- · By standardizing quantum‑resistant signatures within the core VM, Bitcoin Cash positions itself to safeguard transactions against future quantum threats while maintaining backward compatibility.
- · This proactive upgrade could set a precedent for other blockchains seeking secure, long‑term resilience.
