Mastering Bitcoinを読む第1回イントロダクション

ʮ.BTUFSJOH#JUDPJOΛಡΉʯ ୈճΠϯτϩμΫγϣϯ ೥݄೔ ϏοτίΠϯͱ͔ษڧձ খᔹप 4IV,PCVDIJ

খᔹपɹ4IV,PCVDIJɹ!TIV@LPCTIVLPCVDIJ ෱Ԭݝ൧௩ࢢੜ·Εɹฌݿݝ੢ٶࢢɾๅ௩ࢢҭͪ ਆށେֶւࣄՊֶ෦ଔۀ ಸྑઌ୺Պֶٕज़େֶӃେֶ৘ใՊֶݚڀՊम࢜ྃ ৽ଔͰՈిϝʔΧʔͰιϑτ΢ΣΞ։ൃ ͦͷޙ4*FSͰͷडୗ։ൃ౳ େࡕͷϕϯνϟʔͰ#JUDPJO8FC8BMMFUࢼ࡞඼։ൃ ʙגࣜձࣾΩϡʔϒγεςϜ w ʙେࡕʹͯɺڭҭܥେن໛جװγεςϜͷ։ൃͱอक
w ʙɹ౦ژసۈɺٕज़ઓུࣨʢϒϩοΫνΣʔϯͳͲʣ ʙϑϨηοπגࣜձࣾͷγχΞιϑτ΢ΣΞΤϯδχΞ w Ծ૝௨՟ࣄۀऀ޲͚΢ΥϨοτ։ൃΛ୲౰ ࣗݾ঺հ !2

ϑϨηοπ࠾༻৘ใ ΢ΥϨοτΤϯδχΞ ϑϧλΠϜਖ਼ࣾһ ੵۃ࠾༻தʂ ࢒ۀগͳΊɺ౔೔ॕٳΈʴՆقɾ೥຤೥࢝ٳՋ ʲืूϙδγϣϯʳۚ༥ɾܾࡁܥγεςϜܦݧऀ׻ܴ w ։ൃɾอक 5ZQF4DSJQU
/PEFKT -JOVY "84PS"[VSF w ӡ༻ɾ؂ࢹ w ϓϩδΣΫτɾϚωʔδϟʔ ΦϑΟε͸౦ژେֶຊڷΩϟϯύε಺ ϦϊϕͰ৽ஙಉવͷշదۭؒ IUUQTGSFTTFUTDPN IUUQTXXXGBDFCPPLDPNGSFTTFUT IUUQTUXJUUFSDPNGSFTTFUT !3

҉߸௨՟ಡॻձʗษڧձɹIUUQTDSZQUPDVSSFODZDPOOQBTTDPN ʮϏοτίΠϯͱ͔ษڧձʯʢ݄̍ճɿฏ೔໷ʣ w ࣍ճ͸೥݄೔ Ր ʙ%..͞Μ ࿡ຊ໦Ұஸ໨ ެ։४උத ʮ҉߸௨՟ྠಡձʯʢ݄̍ճɿฏ೔໷ʣ w
࣍ճ͸೥݄೔ ਫ ʙ&BTU7FOUVSFT͞Μ ࿡ຊ໦ ެ։४උத DSBTIBDBEFNZ *5ܥಈը഑৴ ʹͯϏοτίΠϯͱ͔ษڧձͷΞʔΧΠϒ഑৴த  IUUQTDSBTIBDBEFNZDPNNVOJUZDSZQUPDVSSFODZ :PV5VCFνϟϯωϧʢྠಡձʗษڧձʣIUUQTHPPHM"2&W+ ϩάϛʔ5FDI ษڧձॻ͖ى͜͠ IUUQTHPPHMK,"-3 ίϛϡχςΟ঺հ !4

ࠓޙͷ҉߸௨՟ಡॻձʗษڧձ ϏοτίΠϯɾϒϩοΫνΣʔϯͷʮجૅٕज़ʯΛଟ͘ͷਓʹ ҉߸௨՟ಡॻձʗษڧձ ҉߸௨՟ྠಡձ w ॳڃऀ޲͚ͷ࿦จྠಡձ ͸φΧϞτ࿦จΛάϧʔϓϫʔΫͰಡΉձʢӳޠݪஶ ʗ೔ຊޠ༁ʣ w
ैདྷ௨Γͷߨٛܗࣜ ϏοτίΠϯͱ͔ษڧձʢ̍ճೋ࿮ʣ w Ұ࿮͸ʮ.BTUFSJOH#JUDPJOΛಡΉʯ w ΋͏ͻͱ࿮͸ैདྷ௨ΓͷςʔϚࣗ༝ !5

.BTUFSJOH#JUDPJOʹ͍ͭͯ "OESFBT."OUPOPQPVMPT ΞϯυϨΞεɾ.ɾΞϯτϊϓϩε ஶ IUUQTHJUIVCDPNCJUDPJOCPPLCJUDPJOCPPL OE&EJUJPO 0`3&*--:͔ΒϖʔύʔόοΫʗ,JOEMFͳͲͷిࢠॻ੶͕ग़൛͞Ε͍ͯΔ ೔ຊޠ༁͸TU&EJUJPOͷΈ ࠓҪਸ໵
ോ֋३Ұ࿠ +POBUIBO6OEFSXPPE 5PNPBLJ4BUP "LJSB.JUBOJ /55ग़൛͔Βॻ੶ʗిࢠॻ੶͕ग़൛ ๜୊ʮϏοτίΠϯͱϒϩοΫνΣʔϯ҉߸௨՟Λࢧ͑Δٕज़ʯ w ඇٕज़ऀͳͲॳ৺ऀ޲͚ͷίϯαΠζ൛͋Γ !6

ΠϯτϩμΫγϣϯ ॻ੶൛ʮ.BTUFSJOH#JUDPJOʯୈ̍ষʮΠϯτϩμΫγϣϯʯʹ૬౰ ͋Δఔ౓शख़ͨ͠ํʹ͸؆୯ͳ಺༰͕ͩɺॳΊͯͷํʹ͸೉͍͔͠΋ #JUDPJOͷΠϝʔδΛ௫ΜͰ΋Β͑͹ͱࢥ͍·͢ IUUQCJUMZCJUDPJOKQO ˢ೔ຊޠ༁1%'͸ͪ͜Β ϊʔτ1$΍λϒϨοτɺεϚʔτϑΥϯͰ1%'Λ͝ཡʹͳΓͳ͕Β͓ௌ͖͘ ͍ͩ͞ ࠓճͷൣғʮΠϯτϩμΫγϣϯʯͷষ͸1%'શମͰ1ʙ DPOQBTTʹࢿྉ͸্͍͛ͯ·͢
!7

#JUDPJOͱ͸ #JUDPJOϓϩτίϧ ʮϓϩτίϧʯIUUQTJUUSFOEKQXPSETQSPUPDPM ྫʣΠϯλʔωοτϓϩτίϧ *OUFSOFU1SPUPDPM*1 #JUDPJOͷن֨ w ϓϩτίϧ ن֨
ʹै͍ͬͯΕ͹ɺͲΜͳιϑτ΢ΣΞͰ΋ྑ͍ ࠃڥ͸ଘࡏ͠ͳ͍ ๏ఆ௨՟ͷւ֎ૹۚʢ೔ຊ͔ΒΞϝϦΧ΁ถυϧΛૹۚͳͲʣʹൺ΂ͨΒɺ &ϝʔϧΛૹΔΑ͏ʹ؆୯ʹૹۚՄೳ ຽؒاۀ͕ӡӦ͢ΔԾ૝௨՟औҾॴʹͯɺ๏ఆ௨՟ͱԾ૝௨՟ͷަ׵͕Մೳ !8

τϥϯβΫγϣϯ ϏοτίΠϯɾϒϩοΫνΣʔϯʹݶΒͣɺ৘ใγεςϜͰσʔλʹର͢Δෆ Մ෼ͳҰ࿈ͷॲཧ !9 ΞϦε͕ϘϒʹిࢠϚωʔ Ͱ ԁૹΔ ΞϦε Ϙϒ ΞϦε͸Ωϟϩϧ͔Βड
͚औ͍ͬͯͨ#5$ ΛϘϒʹૹͬͨ ΞϦεͷ࢒ߴ ԁ Ϙϒͷ࢒ߴ ԁ τϥϯβΫγϣϯ طଘͷσʔλϕʔεγεςϜ ϒϩοΫνΣʔϯ τϥϯβΫγϣϯ

Ծ૝௨՟΢ΥϨοτͱ͸ ΢ΥϨοτ͸ൿີ伴ͷೖΕ෺ τϥϯβΫγϣϯʹΑͬͯද͞ΕͨίΠϯ͸ɺରԠ͢Δൿີ伴͕ͳ͍ͱϩο ΫղআͰ͖ͣૹۚͰ͖ͳ͍ ٯʹ͍͏ͱɺൿີ伴͕ଞਓͷखʹ౉ΔͱૹΕͯ͠·͏ !10 ίΠϯ͕ೖͬ ͍ͯΔΑΓ΋ɺ 伴͕ೖ͍ͬͯ ΔΠϝʔδ
Ωϟϩϧ ΞϦε ୆ாʹॻ͔ΕͨΞϦε ͷίΠϯ͸ΞϦεͷൿ ີ伴͕ͳ͍ͱૹΕͳ͍ ୆ாʹॻ͔ΕͨΩϟϩϧ ͷίΠϯ͸Ωϟϩϧͷൿ ີ伴͕ͳ͍ͱૹΕͳ͍

؅ཧऀͷ͍ͳ͍ۚ༥γεςϜ ؅ཧऀ͕ଘࡏͤͣɺ#JUDPJOωοτϫʔΫʹ͸୭Ͱ΋ࢀՃՄೳʢ཭୤΋Մೳʣ ୭Ͱ΋औҾͷه࿥ͱݕূΛߦ͏ϚΠφʔʹͳΕΔ w ͨͩ͠ɺࠓͰ͸ۀऀϨϕϧͰͳ͍ͱଠ౛ଧͪͰ͖ͳ͍ ฏۉͯ͠෼ʹճݟ͔ͭΔ਺ֶతͳղΛͻͨ͢ΒܭࢉʢϚΠχϯάʣ ϚΠχϯάͷࡍʹ͸ɺ#JUDPJO͕ใुͰ༩͑ΒΕΔʢ৽نൃߦʣ ܾࡁʹՃ͑ɺ৽نൃߦ΋͍ͯ͠Δ ϚΠχϯάͷ೉қ౓ௐ੔͕نఆ͞Ε͓ͯΓɺϚΠφʔ͕૿͑ͨͱͯ͠΋ɺฏۉ ͯ͠෼ʹճղ͕ݟ͔ͭΔΑ͏ʹͳ͍ͬͯΔ
৽نൃߦྔ͸೥Ͱ൒ݮ͍͖ͯ͠ɺ೥ࠒʹ͸৽نൃߦͳ͠ʹ ্ݶ͸ ສ#5$ ൃߦྔ͕ݮগ͍ͯ͘͠ͷͰɺΠϯϑϨʔγϣϯ͕ى͜Βͳ͍σϑϨܕ௨՟ !11

#JUDPJOͷൃߦ্ݶάϥϑ #JUDPJO೔ຊޠ৘ใαΠτϏοτίΠϯͱ͸Կ͔ʁୈճϏοτίΠϯͷಛ௃ IUUQTKQCJUDPJODPNBCPVUXIBUJTCJUDPJO !12

෼ࢄίϯϐϡʔςΟϯάͷΠϊϕʔγϣϯ ΠϯλʔωοτͰ৘ใͷඇରশੑ͕ബΕͭͭ͋Δ ͓ۚ͸ະͩʹ֤ࠃͷதԝۜߦ͕ൃߦͨ͠๏ఆ௨՟͕ϕʔε ిࢠϚωʔͰ͋ͬͯ΋தԝ؅ཧ͞Ε͓ͯΓɺ๏ఆ௨՟ʹՁ஋͕ඥͮ͘ ͓ۚͷඇରশੑ͕ͳ͘ͳͬͨΒʁ ϒϩοΫνΣʔϯ͸ୈೋͷΠϯλʔωοτ ݸਓؒͷϏδωεΛՃ଎ͤ͞Δ΋ͷ !13

#JUDPJOҎલͷσδλϧ௨՟ ࢿݯͱͯ͠ݶΒΕͨ΋ͷ͕௨՟ͱͯ͠࢖ΘΕ͍ͯͨ ۚ΍ۜͳͲۚଐ͸ِ଄Ͱ͖ͳ͍͕ɺ࣋ͪӡͼʹෆศ w ੲͷ೔ຊͩͱ͓ถʢ͜Ε΋࣋ͪӡͼ͕ෆศʣ ࢴฎ͸࣋ͪӡͼ͕༰қ͕ͩɺِ଄͞Ε΍͍͢ w ೔ຊͰ͸௨՟ʹਫ਼޼ͳِ଄๷ࢭٕज़ w ւ֎Ͱ͸ిࢠϚωʔԽଅਐ
ిࢠϚωʔ͸தԝ؅ཧαʔόʔͰ৘ใΛҰݩ؅ཧ͢Ε͹࣮ݱ͸༰қ ॳظͷσδλϧϚωʔ͸தԝ؅ཧ͞Ε͍ͯͯɺ߈ܸ͞Ε͍ͯͨ ෼ࢄϚωʔ͸҉߸ʹΑΔిࢠॺ໊Λࢪ͢͜ͱͰॴ༗ݖΛอূ #JUDPJO͸୯Ұ߈ܸ఺ʢ୯Ұো֐఺ʣͷͳ͍෼ࢄԽ͞Εͨ࢓૊Έ !14

#JUDPJOͭͷ伴 ෼ࢄԽ͞ΕͨQFFSUPQFFSωοτϫʔΫ #JUDPJOϓϩτίϧ தԝ؅ཧαʔόʔΛ࣋ͨͣɺ୭ʹ΋յͤͳ͍ ެ։औҾݩா ϒϩοΫνΣʔϯ औҾΛެʹެ։͢Δ͜ͱͰɺೋॏऔҾʹΑΓෳ੡͞Ε͍ͯͳ͍͜ͱ͕Θ͔ Δ
਺ֶత͔ܾͭఆ࿦తͳ௨՟ൃߦ ෼ࢄϚΠχϯά ܾఆ࿦తɿؔ਺ZG Y ͕͋ͬͨͱͯ͠ɺYͷ஋ͰZͷ஋͕Ұҙʹܾ·Δ ඇܾఆ࿦తɿYͷ஋ͰZͷ஋͕Ұҙʹܾ·Βͳ͍ʢϥϯμϜʣ ෼ࢄऔҾݕূγεςϜ τϥϯβΫγϣϯ4DSJQU ϧʔϧ #JUDPJOϓϩτίϧ ্ɺऔҾσʔλͷܗ͕ࣜ༗ޮͰͳ͍ͱೝΊΒΕ ͳ͍ #JUDPJO4DSJQUͱ͍͏ݹయతͳݴޠͰऔҾσʔλΛνΣοΫ͢Δ !15

#JUDPJOͷྺ࢙ l#JUDPJO"1FFSUP1FFS&MFDUSPOJD$BTI4ZTUFNz4BUPTIJ/BLBNPUP ॴҦʮφΧϞτ࿦จʯΛ೥݄೔ʹϝʔϦϯάϦετ΁౤ߘ ӳޠݪஶɹIUUQTCJUDPJOPSHCJUDPJOQEG ೔ຊޠ༁ɹIUUQXXXLLLFSOFMDPKQRHJT)"-5",'&#VQMPBE OBLBNPUPTBUPTIJQBQFSQEG 65$ ϒϩοΫ͕࠾۷͞Εɺ#JUDPJOՔಇ։࢝ IUUQTXXXCMPDLDIBJODPNKBCUDCMPDL
EDBFF⒎BFBBDCG CBDFG !16

#JUDPJOͷ։ൃ #JUDPJOΫϥΠΞϯτͱ͍͏ιϑτ΢ΣΞ 4BUPTIJ/BLBNPUP͕ϦϑΝϨϯε࣮૷Λ։ൃ͠ɺࠓͰ͸ੈքதͷ։ൃऀ ͕อकɾվળ ϦϑΝϨϯε࣮૷ ࢓༷ॻΛجʹ͓खຊͱ࣮ͯ͠૷͞Εͨιϑτ΢ΣΞ #JUDPJO$PSF CJUDPJOE ͕ͦΕʹ͋ͨΓɺެࣜతʹͳ͍ͬͯΔ w
ʮ4BUPTIJΫϥΠΞϯτʯͱ΋ݺ͹ΕΔ !17

෼ࢄίϯϐϡʔςΟϯάʹ͓͚Δ೉ղ΁ͷղ Ϗβϯνϯক܉໰୊ தԝ؅ཧऀΛඞཁͱͤͣ߹ҙܗ੒Λߦ͏ʹ͸ʁ ؅ཧऀͳͯ͘͠߹ҙܗ੒Λߦ͓͏ͱͯ͠΋ෆਖ਼͕͋Δ͔΋͠Εͳ͍ 1SPPGPG8PSL ࡞ۀূ໌ ͱ͍͏ίϯηϓτΛಋೖ w Ұ൪࿑ྗΛඅ΍ͨ͠ਓͷ࡞ۀΛ෴ͤͳ͍࢓૊Έ !18

#JUDPJOΛ୭͕ͲͷΑ͏ʹ࢖͏ͷ͔ ๺ΞϝϦΧͰͷগֹ෺඼ͷൢച ೔ຊͰ΋ϏοΫΧϝϥͳͲՈిྔൢళɺݸਓܦӦͷόʔ౳ͰܾࡁՄೳ ๺ΞϝϦΧͰͷߴֹ෺඼ͷൢച େੴ఩೭ࢯʮߴֹܾࡁʹͦ͜#JUDPJO͕޲͍͍ͯΔʯ w IUUQTCMPHPTDPNBSUJDMF ւ֎੥ෛαʔϏε ւ֎ͰͷΞ΢τιʔγϯάΛՃ଎ͤ͞Δ νϟϦςΟʔืۚ
ืۚͰͷϐϯϋωɺࠃࡍૹۚͷࡍͷߴֹख਺ྉΛΧοτɺऔҾ͕ಁ໌ ༌ग़ೖ ݸਓͷ༌ग़ೖϏδωεͷՃ଎ #JUDPJOͷ࠾۷ʢϚΠχϯάʣ !19

#JUDPJOΛ͸͡ΊΑ͏ ϑϧΫϥΠΞϯτ ϊʔυػೳʢτϥϯβΫγϣϯͱϒϩοΫͷݕূɾ఻ൖɾอ࣋ʣ w อ࣋ʹ͸ݱࡏ(#΄Ͳඞཁ ΢ΥϨοτػೳ͸ࣗ෼Ͱ࣋ͭʢൿີ伴Λࣗ෼Ͱ؅ཧʣ ܰྔΫϥΠΞϯτ ΢ΥϨοτػೳ͸ࣗ෼Ͱ࣋ͭʢൿີ伴Λࣗ෼Ͱ؅ཧʣ τϥϯβΫγϣϯͱϒϩοΫͷݕূ͸ୈࡾऀʹ೚ͤΔ ΢ΣϒΫϥΠΞϯτ
؅ཧΛୈࡾऀʹҰ೚ ΫϥΠΞϯτͷछྨ͸1%'શମͰ1ʹهࡌ !20

΢ΥϨοτʢΫϥΠΞϯτʣ .VMUJCJU͸΋͏αϙʔτ͞Ε͍ͯͳ͍ IUUQTNVMUJCJUPSH $PQBZ͸σεΫτοϓʗϞόΠϧڞʹ࢖༻Մೳ .BJOOFU ࣮ࡍʹՁ஋ͷ͋Δ#JUDPJO͕ྲྀ௨ 5FTUOFU ։ൃͳͲͷ༻్ͰແՁ஋ͷ#JUDPJO͕ྲྀ௨ ΋࢖༻Մೳ
!21

࠷ॳͷCJUDPJOΛखʹೖΕΔ ೔ຊͰ͸ۚ༥ிೝՄͷࣾͷ͏ͪ҆ఆՔಇ͍ͯ͠ΔऔҾॴΛར༻͢Δͱྑ͍ Ұൠࣾஂ๏ਓԾ૝௨՟ަ׵ۀڠձIUUQTKWDFBPSKQ w CJU'MZFSIUUQTCJUqZFSDPNKBKQ w ϏοτόϯΫIUUQTCJUCBOLDD !22

ςετωοτ ຊ෺ͷωοτϫʔΫ .BJOOFU ͱ͸ผʹ։ൃͳͲͷ༻్ͰແՁ஋ͳςετωο τ UFTUOFU ͕ଘࡏ 'BVDFU ऄޱ Ͱ5FTFUOFUίΠϯ͕ແঈͰೖखՄೳ
IUUQTDPJOGBVDFUFVFOCUDUFTUOFU !23 ޓ׵ੑ͸ͳ͍ ϝΠϯωοτ ςετωοτ

CJUDPJOΛૹΔʗड͚औΔ #MPDL5FD$PWPMʹͯɺ5FTUOFUͷૹۚମݧ IUUQTTQFBLFSEFDLDPNTIVLPCCMPDLUFDDPWPMEPU CJUDPJOTPOHKJOUJZBO $PQBZͷը໘ϨΠΞ΢τ͕มߋʹͳ͍ͬͯΔՕॴ΋͋Γ·͕͢ɺࠓͰ΋࢖ ͑Δࢿྉ ࢀՃऀͷOBHBIJTB͞Μ͕2JJUBʹ·ͱΊͯ͘Ε͍ͯ·͢ <#5$>ԐͰ΋ग़དྷΔ#JUDPJOૹۚϋϯζΦϯ w IUUQTRJJUBDPNOBHBIJTBJUFNTEEBEDDCFED
!24

ϒϩοΫνΣʔϯΤΫεϓϩʔϥ CMPDLDIBJOJOGP͕༗໊Ͱ͕͋ͬͨɺCMPDLDIBJODPNʹυϝΠϯ͕มߋ CMPDLDIBJOJOGP͔ΒCMPDLDIBJODPNʹϦμΠϨΫτ͸Ͱ͖Δ #JUDPJOͷτϥϯβΫγϣϯ աڈ͔ΒશͯͷऔҾཤྺ ɺϒϩοΫͷ৘ใΛՄ ࢹԽ !25

11ωοτϫʔΫͰͷసૹ ࡞੒ͨ͠τϥϯβΫγϣϯ 59 ΛϏοτίΠϯ11ωοτϫʔΫʹϒϩʔυΩϟ ετ ൃใ ͢Δ ϊʔυ͸τϥϯβΫγϣϯͷܗࣜΛνΣοΫ͠ɺϏοτίΠϯͷܗࣜͱ͠ ͯਖ਼͚͠Ε͹ɺྡͷϊʔυʹసૹ͍ͯ͘͠ શͯͷϊʔυ͕ಉ͡τϥϯβΫγϣϯΛ࣋ͭ 
ʢશੈքͷϊʔυʹߦ͖౉Δʣ !26 ΞϦε Ϙϒ 59 ൃใ 59 59 59 సૹ సૹ 59 59 59 సૹ సૹ సૹ సૹ స ૹ

ೋॏࢧ෷͍໰୊ ΞϦε͸Ωϟϩϧ͔Β΋Βͬͨ#5$ΛϘϒʹ΋ૹཧɺΤϨϯʹ΋ૹͬͨͱ ͢Δʢೋॏࢧ෷͍Λͨ͠ʣ ͲͪΒͷτϥϯβΫγϣϯΛਖ਼౰ͱݟͳ͔͢ ؅ཧऀ͕͍Ε͹؅ཧऀͷϊʔυʹಧ͍ͨઌணॱͰܾΊΕ͹ྑ͍ ͔͠͠ɺ؅ཧऀͷ͍ͳ͍෼ࢄωοτϫʔΫͰ͜ͷରࡦΛ͠ͳ͚Ε͹ͳΒͳ 11ωοτϫʔΫ্Ͱઌணॱͷ൑ఆ͸ෆՄೳ !27 ΞϦε Ϙϒ
59 5PϘϒ 59 5PΤϨϯ Ωϟϩϧ ΤϨϯ #5$ #5$ #5$ ೋॏࢧ෷͍ Ϙϒ ΤϨϯ

ೋॏࢧ෷͍ΛແޮԽ͢Δʹ͸ʁ ೋॏࢧ෷͍ΛແޮԽ͢ΔͨΊʹɺίΠϯ͕࢖༻ࡁΈͰ͋Δ͔ͷ൑ఆ͕ඞཁ ࢖༻ࡁΈͰ͋Δ͜ͱ͸ɺܝࣔ൘ʹ·ͱΊͯ஌ΒͤΔ ϒϩοΫ͸ެ༻ܝࣔ൘ !28 ࢖༻ࡁΈίΠϯҰཡ ΞϦεˠϘϒ#5$ ΤϨϯˠΩϟϩϧ#5$ ΩϟϩϧˠσϏοτ#5$ ΩϟϩϧˠΞϦε#5$
ϘϒˠΤϨϯ#5$

τϥϯβΫγϣϯͷঝೝ τϥϯβΫγϣϯΛϒϩʔυΩϟετͨ࣌͠఺Ͱɺ৘ใ͸ੈքதʹ஌Β͞ΕΔ ͕ɺͦͷτϥϯβΫγϣϯΛϚΠφʔ͕ϒϩοΫʹॻ͖ࠐΜͰॳΊͯঝೝ͞Ε Δ !29 ΞϦε Ωϟϩϧ #5$ τϥϯβΫγϣϯ ϚΠχϯά
࠷৽ϒϩοΫΛϒϩο ΫνΣʔϯʹͭͳ͍Ͱ ͍͘ ϒϩοΫੜ੒

ଓ͖͸࣍ճʹ Ր ༧ఆʢొஃऀ͸ܾఆʣ ʮ#JUDPJOͷ࢓૊Έʯͷষʢ1%'શମͰ1ʙʣ ݟಀͨ͠ճ͸ΞʔΧΠϒͰνΣοΫ DSBTIBDBEFNZ *5ܥಈը഑৴ ʹͯϏοτίΠϯͱ͔ษڧձͷΞʔΧΠϒ ഑৴த 
IUUQTDSBTIBDBEFNZDPNNVOJUZDSZQUPDVSSFODZ :PV5VCFνϟϯωϧʢྠಡձʗษڧձʣIUUQTHPPHM"2&W+ ݄Ҏ߱ͷൃදऀืूதʂ ݄͸ʮ#JUDPJOΫϥΠΞϯτʯͷষʢ1%'શମͰ1ʙʣ ݄͸ʮΩʔɺΞυϨεɺ΢ΥϨοτʯͷষʢ1%'શମͰ1ʙʣ w ͜ͷষ͸෼࿮͔̎ճʹ෼͚Δ͔ʁ !30

͓͠·͍ ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ࣭໰Λ͓ؾܰʹͲ͏ͧ ࠙਌ձͰ࣭໰͍͍ͯͨͩͯ͠΋݁ߏͰ͢ DPOQBTTʹࢿྉ͸্͍͛ͯ·͢ !31

Mastering Bitcoinを読む第1回イントロダクション

Mastering Bitcoinを読む第1回イントロダクション

Shu Kobuchi

More Decks by Shu Kobuchi

Other Decks in Technology

Featured

Transcript

ʮ.BTUFSJOH#JUDPJOΛಡΉʯ ୈճΠϯτϩμΫγϣϯ ೥݄೔ ϏοτίΠϯͱ͔ษڧձ খᔹप 4IV,PCVDIJ

ϑϨηοπ࠾༻৘ใ ΢ΥϨοτΤϯδχΞ ϑϧλΠϜਖ਼ࣾһ ੵۃ࠾༻தʂ ࢒ۀগͳΊɺ౔೔ॕٳΈʴՆقɾ೥຤೥࢝ٳՋ ʲืूϙδγϣϯʳۚ༥ɾܾࡁܥγεςϜܦݧऀ׻ܴ w ։ൃɾอक 5ZQF4DSJQU

҉߸௨՟ಡॻձʗษڧձɹIUUQTDSZQUPDVSSFODZDPOOQBTTDPN ʮϏοτίΠϯͱ͔ษڧձʯʢ݄̍ճɿฏ೔໷ʣ w ࣍ճ͸೥݄೔ Ր ʙ%..͞Μ ࿡ຊ໦Ұஸ໨ ެ։४උத ʮ҉߸௨՟ྠಡձʯʢ݄̍ճɿฏ೔໷ʣ w

ࠓޙͷ҉߸௨՟ಡॻձʗษڧձ ϏοτίΠϯɾϒϩοΫνΣʔϯͷʮجૅٕज़ʯΛଟ͘ͷਓʹ ҉߸௨՟ಡॻձʗษڧձ ҉߸௨՟ྠಡձ w ॳڃऀ޲͚ͷ࿦จྠಡձ ͸φΧϞτ࿦จΛάϧʔϓϫʔΫͰಡΉձʢӳޠݪஶ ʗ೔ຊޠ༁ʣ w

.BTUFSJOH#JUDPJOʹ͍ͭͯ "OESFBT."OUPOPQPVMPT ΞϯυϨΞεɾ.ɾΞϯτϊϓϩε ஶ IUUQTHJUIVCDPNCJUDPJOCPPLCJUDPJOCPPL OE&EJUJPO 0`3&*--:͔ΒϖʔύʔόοΫʗ,JOEMFͳͲͷిࢠॻ੶͕ग़൛͞Ε͍ͯΔ ೔ຊޠ༁͸TU&EJUJPOͷΈ ࠓҪਸ໵

#JUDPJOͱ͸ #JUDPJOϓϩτίϧ ʮϓϩτίϧʯIUUQTJUUSFOEKQXPSETQSPUPDPM ྫʣΠϯλʔωοτϓϩτίϧ OUFSOFU1SPUPDPM1 #JUDPJOͷن֨ w ϓϩτίϧ ن֨

τϥϯβΫγϣϯ ϏοτίΠϯɾϒϩοΫνΣʔϯʹݶΒͣɺ৘ใγεςϜͰσʔλʹର͢Δෆ Մ෼ͳҰ࿈ͷॲཧ !9 ΞϦε͕ϘϒʹిࢠϚωʔ Ͱ ԁૹΔ ΞϦε Ϙϒ ΞϦε͸Ωϟϩϧ͔Βड

Ծ૝௨՟΢ΥϨοτͱ͸ ΢ΥϨοτ͸ൿີ伴ͷೖΕ෺ τϥϯβΫγϣϯʹΑͬͯද͞ΕͨίΠϯ͸ɺରԠ͢Δൿີ伴͕ͳ͍ͱϩο ΫղআͰ͖ͣૹۚͰ͖ͳ͍ ٯʹ͍͏ͱɺൿີ伴͕ଞਓͷखʹ౉ΔͱૹΕͯ͠·͏ !10 ίΠϯ͕ೖͬ ͍ͯΔΑΓ΋ɺ 伴͕ೖ͍ͬͯ ΔΠϝʔδ

#JUDPJOͷൃߦ্ݶάϥϑ #JUDPJO೔ຊޠ৘ใαΠτϏοτίΠϯͱ͸Կ͔ʁୈճϏοτίΠϯͷಛ௃ IUUQTKQCJUDPJODPNBCPVUXIBUJTCJUDPJO !12

#JUDPJOҎલͷσδλϧ௨՟ ࢿݯͱͯ͠ݶΒΕͨ΋ͷ͕௨՟ͱͯ͠࢖ΘΕ͍ͯͨ ۚ΍ۜͳͲۚଐ͸ِ଄Ͱ͖ͳ͍͕ɺ࣋ͪӡͼʹෆศ w ੲͷ೔ຊͩͱ͓ถʢ͜Ε΋࣋ͪӡͼ͕ෆศʣ ࢴฎ͸࣋ͪӡͼ͕༰қ͕ͩɺِ଄͞Ε΍͍͢ w ೔ຊͰ͸௨՟ʹਫ਼޼ͳِ଄๷ࢭٕज़ w ւ֎Ͱ͸ిࢠϚωʔԽଅਐ

#JUDPJOͭͷ伴 ෼ࢄԽ͞ΕͨQFFSUPQFFSωοτϫʔΫ #JUDPJOϓϩτίϧ தԝ؅ཧαʔόʔΛ࣋ͨͣɺ୭ʹ΋յͤͳ͍ ެ։औҾݩா ϒϩοΫνΣʔϯ औҾΛެʹެ։͢Δ͜ͱͰɺೋॏऔҾʹΑΓෳ੡͞Ε͍ͯͳ͍͜ͱ͕Θ͔ Δ

#JUDPJOͷ։ൃ #JUDPJOΫϥΠΞϯτͱ͍͏ιϑτ΢ΣΞ 4BUPTIJ/BLBNPUP͕ϦϑΝϨϯε࣮૷Λ։ൃ͠ɺࠓͰ͸ੈքதͷ։ൃऀ ͕อकɾվળ ϦϑΝϨϯε࣮૷ ࢓༷ॻΛجʹ͓खຊͱ࣮ͯ͠૷͞Εͨιϑτ΢ΣΞ #JUDPJO$PSF CJUDPJOE ͕ͦΕʹ͋ͨΓɺެࣜతʹͳ͍ͬͯΔ w

෼ࢄίϯϐϡʔςΟϯάʹ͓͚Δ೉ղ΁ͷղ Ϗβϯνϯক܉໰୊ தԝ؅ཧऀΛඞཁͱͤͣ߹ҙܗ੒Λߦ͏ʹ͸ʁ ؅ཧऀͳͯ͘͠߹ҙܗ੒Λߦ͓͏ͱͯ͠΋ෆਖ਼͕͋Δ͔΋͠Εͳ͍ 1SPPGPG8PSL ࡞ۀূ໌ ͱ͍͏ίϯηϓτΛಋೖ w Ұ൪࿑ྗΛඅ΍ͨ͠ਓͷ࡞ۀΛ෴ͤͳ͍࢓૊Έ !18

΢ΥϨοτʢΫϥΠΞϯτʣ .VMUJCJU͸΋͏αϙʔτ͞Ε͍ͯͳ͍ IUUQTNVMUJCJUPSH $PQBZ͸σεΫτοϓʗϞόΠϧڞʹ࢖༻Մೳ .BJOOFU ࣮ࡍʹՁ஋ͷ͋Δ#JUDPJO͕ྲྀ௨ 5FTUOFU ։ൃͳͲͷ༻్ͰແՁ஋ͷ#JUDPJO͕ྲྀ௨ ΋࢖༻Մೳ

࠷ॳͷCJUDPJOΛखʹೖΕΔ ೔ຊͰ͸ۚ༥ிೝՄͷࣾͷ͏ͪ҆ఆՔಇ͍ͯ͠ΔऔҾॴΛར༻͢Δͱྑ͍ Ұൠࣾஂ๏ਓԾ૝௨՟ަ׵ۀڠձIUUQTKWDFBPSKQ w CJU'MZFSIUUQTCJUqZFSDPNKBKQ w ϏοτόϯΫIUUQTCJUCBOLDD !22

ςετωοτ ຊ෺ͷωοτϫʔΫ .BJOOFU ͱ͸ผʹ։ൃͳͲͷ༻్ͰແՁ஋ͳςετωο τ UFTUOFU ͕ଘࡏ 'BVDFU ऄޱ Ͱ5FTFUOFUίΠϯ͕ແঈͰೖखՄೳ

ϒϩοΫνΣʔϯΤΫεϓϩʔϥ CMPDLDIBJOJOGP͕༗໊Ͱ͕͋ͬͨɺCMPDLDIBJODPNʹυϝΠϯ͕มߋ CMPDLDIBJOJOGP͔ΒCMPDLDIBJODPNʹϦμΠϨΫτ͸Ͱ͖Δ #JUDPJOͷτϥϯβΫγϣϯ աڈ͔ΒશͯͷऔҾཤྺ ɺϒϩοΫͷ৘ใΛՄ ࢹԽ !25

11ωοτϫʔΫͰͷసૹ ࡞੒ͨ͠τϥϯβΫγϣϯ 59 ΛϏοτίΠϯ11ωοτϫʔΫʹϒϩʔυΩϟ ετ ൃใ ͢Δ ϊʔυ͸τϥϯβΫγϣϯͷܗࣜΛνΣοΫ͠ɺϏοτίΠϯͷܗࣜͱ͠ ͯਖ਼͚͠Ε͹ɺྡͷϊʔυʹసૹ͍ͯ͘͠ શͯͷϊʔυ͕ಉ͡τϥϯβΫγϣϯΛ࣋ͭ

ೋॏࢧ෷͍ΛແޮԽ͢Δʹ͸ʁ ೋॏࢧ෷͍ΛແޮԽ͢ΔͨΊʹɺίΠϯ͕࢖༻ࡁΈͰ͋Δ͔ͷ൑ఆ͕ඞཁ ࢖༻ࡁΈͰ͋Δ͜ͱ͸ɺܝࣔ൘ʹ·ͱΊͯ஌ΒͤΔ ϒϩοΫ͸ެ༻ܝࣔ൘ !28 ࢖༻ࡁΈίΠϯҰཡ ΞϦεˠϘϒ#5$ ΤϨϯˠΩϟϩϧ#5$ ΩϟϩϧˠσϏοτ#5$ ΩϟϩϧˠΞϦε#5$

τϥϯβΫγϣϯͷঝೝ τϥϯβΫγϣϯΛϒϩʔυΩϟετͨ࣌͠఺Ͱɺ৘ใ͸ੈքதʹ஌Β͞ΕΔ ͕ɺͦͷτϥϯβΫγϣϯΛϚΠφʔ͕ϒϩοΫʹॻ͖ࠐΜͰॳΊͯঝೝ͞Ε Δ !29 ΞϦε Ωϟϩϧ #5$ τϥϯβΫγϣϯ ϚΠχϯά

ଓ͖͸࣍ճʹ Ր ༧ఆʢొஃऀ͸ܾఆʣ ʮ#JUDPJOͷ࢓૊Έʯͷষʢ1%'શମͰ1ʙʣ ݟಀͨ͠ճ͸ΞʔΧΠϒͰνΣοΫ DSBTIBDBEFNZ *5ܥಈը഑৴ ʹͯϏοτίΠϯͱ͔ษڧձͷΞʔΧΠϒ ഑৴த

͓͠·͍ ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ࣭໰Λ͓ؾܰʹͲ͏ͧ ࠙਌ձͰ࣭໰͍͍ͯͨͩͯ͠΋݁ߏͰ͢ DPOQBTTʹࢿྉ͸্͍͛ͯ·͢ !31