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[84.184.66.16]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-47a8f4ef38bsm238785615e9.0.2025.12.15.23.25.07 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 15 Dec 2025 23:25:08 -0800 (PST) Sender: Jonas Nick Message-ID: <34eaa8a5-69c1-4825-8f00-ff6de755ba09@gmail.com> Date: Tue, 16 Dec 2025 07:25:07 +0000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [bitcoindev] Re: Hash-Based Signatures for Bitcoin's Post-Quantum Future To: bitcoindev@googlegroups.com References: <3e815d03-5e21-41ed-ba1a-4f9b2120a986n@googlegroups.com> <492feee7-e0da-4d4d-bb7a-e903b321a977n@googlegroups.com> Content-Language: en-US From: Jonas Nick In-Reply-To: <492feee7-e0da-4d4d-bb7a-e903b321a977n@googlegroups.com> Content-Type: text/plain; charset="UTF-8"; format=flowed X-Original-Sender: jonasdnick@gmail.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b="mMOY/jM0"; spf=pass (google.com: domain of jonasd.nick@gmail.com designates 2a00:1450:4864:20::32c as permitted sender) smtp.mailfrom=jonasd.nick@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@googlegroups.com Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -0.5 (/) Hi Boris, Just to add to what Mike said: one of the most interesting questions is whether MPC considerations should inform parameter selection. As of right now, the generic MPC approach seems rather impractical, but that shouldn't discourage experimentation and further research. It's possible to imagine scenarios where 85-minute signing is acceptable. Moreover, stateful signature schemes like SHRINCS [0] only require a few hashes in the best case, which would make MPC-based N/N multisig significantly more tractable than with full SPHINCS+. However, since SHRINCS signatures are already small, the absolute space savings are smaller. [0] https://delvingbitcoin.org/t/shrincs-324-byte-stateful-post-quantum-signatures-with-static-backups/2158 Jonas -- You received this message because you are subscribed to the Google Groups "Bitcoin Development Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an email to bitcoindev+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/34eaa8a5-69c1-4825-8f00-ff6de755ba09%40gmail.com.