Blockstream đề xuất sơ đồ chữ ký hậu lượng tử SHRINCS cho bitcoin

The Huoxing Finance report states that Blockstream has released a Bitcoin Improvement Proposal (BIP) proposing the SHRINCS post-quantum signature scheme. SHRINCS is a hash-based post-quantum signature scheme with a minimum size of 548 bytes, approximately 9 times larger than existing Schnorr signatures, but significantly smaller than the NIST-approved ML-DSA and SPHINCS+ schemes. The scheme has already undergone production testing on the Liquid sidechain and includes a copy of the Bitcoin whitepaper. However, the scheme also has limitations. The BIP warns that security proofs are still pending, and the scheme is stateful—each signature requires storing used keys, with the signature size increasing by 16 bytes per use. In the event of device loss, approximately 5777 bytes of stateless fallback transactions are required for recovery. Blockstream estimates that adopting SHRINCS would allow Bitcoin to maintain a speed of about 3 TPS, which could increase to 6.7 TPS when combined with ZK proof aggregation.