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Blockchain Kyoto #2 〜楕円曲線暗号・ビットコインアドレス〜

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April 25, 2018
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Blockchain Kyoto #2 〜楕円曲線暗号・ビットコインアドレス〜

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いっしー

April 25, 2018
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Transcript

  1. Blockchain ษڧձ in Kyoto #2

  2. ࣗݾ঺հ ੴ໺൏ޔ ϑϦʔϥϯεwebϓϩάϥϚʔ

  3. ಺༰

  4. ಺༰

  5. ൿີ伴ͷ࡞੒ ग़དྷ্͕ͬͨ਺஋͕ެ։伴Λ࡞Δ࣌ʹ࢖͏ ପԁۂઢͷҐ਺ p ΑΓখ͚͞Ε͹࠾༻͠·͢ɻ ίΠϯΛ౤͛ͯදͳΒ1ɺཪͳΒ0Λࢴʹॻ͖·͢ɻ ͜ΕΛ256ճ܁Γฦͯ͠256Ϗοτͷ਺஋Λ࡞੒͠·͢ɻ ※࣮ࡍ͸ύιίϯͷཚ਺ੜ੒ثΛ࢖͍·͢ɻ

  6. ެ։伴ͷ࡞੒ ପԁۂઢ҉߸ɻ

  7. ެ։伴ͷ࡞੒ ପԁۂઢ

  8. ެ։伴ͷ࡞੒ ପԁۂઢ ϏοτίΠϯͰ͸ɺಛʹsecp256k1ۂઢΛ࢖͍·͢ɻ ※mod͸ׂΓࢉͷ༨ΓΛٻΊΔ΋ͷɻ ϓϩάϥϜͰ͍͏ʮ%ʯ ྫʣ5 mod 2 = 1

  9. ެ։伴ͷ࡞੒

  10. ެ։伴ͷ࡞੒

  11. ެ։伴ͷ࡞੒

  12. ެ։伴ͷ࡞੒

  13. ެ։伴ͷ࡞੒

  14. ެ։伴ͷ࡞੒ ɿެ։伴 ɿൿີ伴

  15. ϏοτίΠϯΞυϨεͷ࡞੒

  16. ϏοτίΠϯΞυϨεͷ࡞੒

  17. ϏοτίΠϯΞυϨεͷ࡞੒

  18. ·ͱΊ

  19. ͓·͚ ൿີ伴͸ൿີʹ͠·͠ΐ͏ɻ ↓࠮ٗαΠτ