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Thu, 20 Sep 2018 09:19:57 -0700 (PDT) To: bitcoin-dev@lists.linuxfoundation.org From: Andrew Kozlik Openpgp: preference=signencrypt Autocrypt: addr=andrew.kozlik@satoshilabs.com; keydata= xsFNBFt62C4BEAC+pOtoQthf9I0vZIfVPbebk/1i1Znw0AmbqZr36fqfdGcCdZ2gDJDLjisd QZVsHbZ4WAlFL5AKH2YJlwBrjxN+gTh0W231QTWUNGqOR2v61gBo3tBhxmr+9yP/iNuQpLCn E+P1hN6si9IkaxbqCVW6eUiexKsY4gK8RR6UgqJ73h/Y5p57NVpbuYvrKpFp17qEfKO0ToNC kSQzLZsOFRGZzbIp5dipPWDR04TbvliPR+Gn0HBnGC9wvfqFSlJiHxqB8GSCyviGXiGCOwAs SDEfr2yybxR/hnCURDm9jWX7Rv+1MSJzlRikQ/NFoLsH2FFRG5RPbRLGHBEeRioP5FcCtCsq rAvICud4Hvqm9FjjsIDL8YpKsRsC6VdphPVV2vggeDulMtl9jlZb38vMrQMyT5NnQr04oPmI DdD5puYcs1eoYhryOf4g6dEj/Zyndg9wXTQC6nXSTIFPEMNVv4aUwMr1z/pPW3f7zokIRc0a h/Kxn9kUe9UB5ASgH7UoKD13pPmf6XSEpwUVXGp97s7JmlaheN45a3odM9y3rn8doSdLacB2 dRKSBWaebYEnMitHpiBVdTCVYkbq35bblGYC/RURaGUBA/aGWv0ozPYq+7uJY4VJ1nz/T9fu g8Mes1Z03YAOoHP9uDZDa8Ops/9N7ygUzCqL/LWeQC5I6YdoyQARAQABzS1BbmRyZXcgS296 bGlrIDxhbmRyZXcua296bGlrQHNhdG9zaGlsYWJzLmNvbT7CwX0EEwEIACcFAlt62C4CGyMF CQlmAYAFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQUemaa1Zc2aTb9w/+MFYbXAbpYOVG 3m3kLtPnWVpMXOIWVoK1r4j5/J8L2oBjf6JD/br55ZU6VaE5RYwuAW9NfU6OqP0NVTARGXpH sf3p4mZ7W7FtwdkBm36//R9DN76eQXfu1GoyYjLTbF7KqbqQjckNVYNMx4kIIShID7nMasN7 Vt/zhB0jc8Ay5T5/5YynNqR0WQAw6dF979xHrKXuAvuJ0bSVU+tUaDm07jp09tB5nM2dUQGn vUh0D6aZYVhW+hO0tfWvY/RSwHP9+TdT0VH8sd8mFUM4TIT7fbdk4Ceq2oCy3/VusDQWQljQ AHXQ7mEJWeRX0XSACTU/337igFbW45AvJAy0bPL4wz8Jfm8x0W0f3x/U78yQIYsTFJIAba4U RKONJ0AxVGPIRy4jH1sddkP1xEgS4m3QjQGnlsjmjHcCX4gMlQLowJz5JQ4x/CnnGd8Aiki8 n4rrov0VDEwPQUdVSWHB9cIagAPfS7p6j7hVc51DyxMFwb7fkBcuEhwTd90TAo843igGVYbv 4xnvaUgGvvjZZcOjbfHwzUmhvCtJYW9GQjFfGcTmYHBaRvIQeNYLrrsGtpUj83qaUgwe1GAl u0RXB+YXUKM55MbvHBq0yABRku+AbGlqGzfm46giaFlqTxji3qjP/M44hOgbOqmDemfc9BDx iATyQgGry8TFZeAOGqXRd+7OwU0EW3rYLgEQAMpVn2xMtJuaH7fU9STafUCbSwzP3CS4wseD ijEeo/Pce46cqMNYx4u0AQBxwtIReDe9KSUugVUDkywsXIweZytY+RXYwV12bcxmStP06+LH 79UKDFN2DqsJRg5KzG91+fPIX4XnEpdufKy2EF6Isio8wlwfLCtJgrcXLLlSUXmavv+QNqU7 /HLT5gsSaIPUns8t+miZ2lHxMjKDJCbuWdWZymhZXc5e0sGkLVo0mq1CzjObyDuYyvXhAJZa jDFsMY9dF8iA5bIGmhAQmfEgQSxe6za60i/M92TNHKENb2x1rqXXr0ctjNd73TKPkOIVYPPx 0IBJiltC7BRExE7FSNc70JJxg3amJHlPPVtz/MkkiW8mLbJrcTTV1Zrq4U8Dm8ErNjA6L5Fc S6p/Z4F1ZlQFDdao5V24jGti2tpGbP7zQqkcieeoSh7luK8a5AfQy+Im2C4BgrHseCqpd8Ik Vfwmiy90nGtgScqn52fr18rWE3zfx5Uu7IbRPxLNL6VBfCeI+w2HkY0LTp3/iYvBZU6Dt12s Z2XYrwYuuf+Pf6CAuITyXjIEdaKPuYYrkxG5U5EFeefwhpQgmT2BH+Jgp9+4fuu6W8wQMYbt 7yXtm/Z1KI2tzZ/x006shhzG0b5hiJu5wf+vJxaREv3cnkPjGGXmLLMXerlXzPJys5hJ0lhx ABEBAAHCwWUEGAEIAA8FAlt62C4CGwwFCQlmAYAACgkQUemaa1Zc2aTPZxAAop/Zj3xA6f9M sl9hTAYdodSwXtXr1xdtRkciO0CitqSvBLB7xeohfHxfUa06aXyBNMA0jwIMIn4yjOD7jNOy 9cj5Alql644Dt0/fRVniSnV+b2ebfnbywa6jBIIR/FPq4nJaJ0AgzwJm/0OR7+1LOCONA72w tUCAvGyhM2c4yPYjULCKYPUlQPy5fKpGBggP3cbPZLH1gmEL61Ph27rejnW2XC1EL3J/BPcL ixKXk8po/x94qkV6f506isszuRmJBnAXzYa6lXNjpDySfXhrlspY1OJlR0CK+4D3nJiaePYt lh3LoJbqsuK/ERfiV8vsJRV/SENtjqTrd9tbb8Ab+3v6ilCYJ6mXUMOy0Jc1rGcOSGyH6JVz WHDzk/AvZbP9Uai/hDIskLFq5i/6fQY+uaKHKFrc9S2rQ8g1deKWqVZEGyUYA5ICkTUpHgJT IwZzFZyKmFzmI1f3gLh9hHKKLHrq/zv6myXCko6Tn2PyeNXyekmqKk4M61J7v9SJc0H2iVuR 0yVdBihwBDm18cA+a2T4u6NtQVtI4eIfA79aBF0IIJ/VbKxgFOjQmWWL1ej5BAdwA752f6rr rpSashtUuLDAcUnS6PKZK3qZltDAJeOhK+B2ejX7GPAVf5UYT1JB9pn9urN+C5v9aDPjyRrU ADdTkt305KgIVcafMVR1Brg= Message-ID: <4e2c7b41-1e16-b89a-04d8-776f3469141a@satoshilabs.com> Date: Thu, 20 Sep 2018 18:19:56 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-US X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org X-Mailman-Approved-At: Fri, 21 Sep 2018 18:17:22 +0000 Subject: [bitcoin-dev] SLIP-0039: Shamir's Secret-Sharing for Mnemonic Codes X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Sep 2018 16:20:00 -0000 Hello everyone, We are currently writing a new specification for splitting BIP-32 master seeds into multiple mnemonics using Shamir's secret sharing scheme. We would be interested in getting your feedback with regard to the high-level design of the new spec: https://github.com/satoshilabs/slips/blob/master/slip-0039.md Please focus your attention on the section entitled "Master secret derivation functions", which proposes several different solutions. Note that there is a Design Rationale section at the very end of the document, which should answer some of the questions you may have. The document is a work in progress and we are aware that some technical details have not been fully specified. These will be completed once the high level design has been settled. Thanks, Andrew Kozlik TREZOR Team