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dara=google.com ARC-Authentication-Results: i=1; gmr-mx.google.com; dkim=pass header.i=@mail.wpsoftware.net header.s=default header.b=YibzxC1d; spf=pass (google.com: domain of apoelstra@wpsoftware.net designates 66.183.0.205 as permitted sender) smtp.mailfrom=apoelstra@wpsoftware.net; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=wpsoftware.net Received: from mail.wpsoftware.net ([66.183.0.205]) by gmr-mx.google.com with ESMTP id 98e67ed59e1d1-2bf69961c56si87609a91.1.2024.05.24.07.14.50 for ; Fri, 24 May 2024 07:14:50 -0700 (PDT) Received-SPF: pass (google.com: domain of apoelstra@wpsoftware.net designates 66.183.0.205 as permitted sender) client-ip=66.183.0.205; Received: from camus (camus-andrew.lan [192.168.0.190]) by mail.wpsoftware.net (Postfix) with ESMTPSA id EC13440106; Fri, 24 May 2024 14:14:49 +0000 (UTC) Date: Fri, 24 May 2024 14:14:48 +0000 From: Andrew Poelstra To: Rama Gan , g@camus Cc: "bitcoindev@googlegroups.com" Subject: Re: [bitcoindev] Penlock, a paper-computer for secret-splitting BIP39 seed phrases Message-ID: References: <9bt6npqSdpuYOcaDySZDvBOwXVq_v70FBnIseMT6AXNZ4V9HylyubEaGU0S8K5TMckXTcUqQIv-FN-QLIZjj8hJbzfB9ja9S8gxKTaQ2FfM=@proton.me> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="UB+UFCra7fvN6eVL" Content-Disposition: inline In-Reply-To: X-Original-Sender: apoelstra@wpsoftware.net X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@mail.wpsoftware.net header.s=default header.b=YibzxC1d; spf=pass (google.com: domain of apoelstra@wpsoftware.net designates 66.183.0.205 as permitted sender) smtp.mailfrom=apoelstra@wpsoftware.net; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=wpsoftware.net 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: -0.8 (/) --UB+UFCra7fvN6eVL Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline On Fri, May 24, 2024 at 10:39:57AM +0000, Rama Gan wrote: > > About a header, the problem is that the fast 2-of-M algorithm won't preserve > constant values across shares as Codex32 does. > Are you sure? It seems that if two shares have the same value in a given position, the line through them should be constant, meaning that every other share will have the same constant value. -- Andrew Poelstra Director, Blockstream Research Email: apoelstra at wpsoftware.net Web: https://www.wpsoftware.net/andrew The sun is always shining in space -Justin Lewis-Webster -- 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 on the web visit https://groups.google.com/d/msgid/bitcoindev/ZlCg2C4kZSGUN3Qx%40camus. --UB+UFCra7fvN6eVL Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEkPnKPD7Je+ki35VexYjWPOQbl8EFAmZQoNYACgkQxYjWPOQb l8Gj3AgAh2UI23u3aBsbQTCC7/l6sqB6hPZwW/XsTfnH7p4/twYqOXdon3zMVXAU F8MkkLknax11deQ45V8tvANh35kP2IhOgmbG/zalqHAOk4HrWUJtynIzUQnjvrut 1oJTchzzl0ZbjJr5DVCnfKxSVX5SoTbQoYj6tYRPFX0rnPdPfoRnbrHF2XtNCICR ObHgKcyJH5X1eXtRrLbO80xQ/mw0oiLf1aZBsIDZCM1M3mGd3QtQuXzyKhasb7Qx 9X3+C6uwKTXcbCax1+0SPH0OG1U5T2wLpKbX+D2hreAqehzlizB3rdiZsjVSMxUZ PZV9B8AO0os1EkBegzWpIrx26cPkqg== =e7sn -----END PGP SIGNATURE----- --UB+UFCra7fvN6eVL--