次世代の認証(WebAuthn/FIDO2)について説明を試みる

by OSCA

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04$" ᖛ໺Ұೋࡾ !FOHJOFFS@PTDB ࣍ੈ୅ͷೝূʹ͍ͭͯઆ໌ΛࢼΈΔ 8FC"VUIFOUJDBUJPO"1*'*%0 8&#ΤϯδχΞษڧձ

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ࣗݾ঺հ © OSCA 04$"ᖛ໺Ұೋࡾ ͸·ͷ͔ͣ;Έ 4*FS໷ܠࣸਅՈ * ʮ8&#ΤϯδχΞษڧձʯΛओ࠵ * +BWB 1)1ܥͷ8&#ΤϯδχΞ * ਓ޻஌ೳ "* ͷ։ൃ΋΍ͬͯΔ * ݸਓͰ΋714आΓͯ8&#αʔϏεΛӡӦ͢Δͷ͕झຯ * ເͷࠃɹెาݍ಺ॅΈ * !FOHJOFFS@PTDB!PTDBQIPUP!EJTOFZ@PTDB

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ʮύεϫʔυೝূʯͷ՝୊Λղܾ͢Δ࣍ੈ୅ͷೝূ © OSCA ΞΧ΢ϯτ ύεϫʔυ ϩάΠϯ 8&#ͷੈքʹ͓͍ͯ΋ύεϫʔυΛར༻ͨ͠ೝূʹมΘ Δɺ৽͍͠ೝূٕज़͕ීٴ͠͸͡ΊΑ͏ͱ͍ͯ͠·͢ɻ

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ʮύεϫʔυೝূʯͷ՝୊Λղܾ͢Δ࣍ੈ୅ͷೝূ © OSCA ෼ͱ͍͏୹͍࿮ͷதͰɺ ʮͲΜͳ΋ͷͳͷ͔ʯͱ͍͏֓ཁΛ͓఻͍͑ͨ͠ͱࢥ͍·͢ɻ

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© OSCA ೥݄೔1VCMJDLFZ ύεϫʔυʹґଘ͠ͳ͍ೝূʮ8FC"VUIOʯΛ$ISPNF'JSFGPY&EHF͕࣮૷։ ࢝ɺ8$͕ඪ४Խɻ8FC͸ύεϫʔυʹґଘ͠ͳ͍ΑΓ҆શͰศརͳ΋ͷ΁ IUUQTXXXQVCMJDLFZKQCMPHXFCBVUIODISPNFGJSFGPYFEHFXDXFCIUNM l(PPHMFɺ.P[JMMBɺϚΠΫϩιϑτ͕ ʮ8FC"VUIOʯͷ࣮૷Λ։࢝ɻ͜ΕʹΑ ͬͯʮ'*%0ʯͷීٴ͕ظ଴͞Εɺ8FC ϒϥ΢β͔Βࢦ໲ೝূ΍إೝূͳͲͰ؆ ୯ʹ8FCαΠτ΁ͷϩάΠϯ΍ࢧ෷͍ͷ ঝೝͱ͍ͬͨૢ࡞͕࣮ݱ͞Εͦ͏ͩɻz

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© OSCA ೥݄೔;%/FU+BQBO ʮ(PPHMF$ISPNFʯ҆ఆ൛ϦϦʔεʮ4QFDUSFʯ؇࿨ࡦɺʮ8FC"VUIOʯର ԠͳͲ IUUQTKBQBO[EOFUDPNBSUJDMF l݅ͷηΩϡϦςΟमਖ਼Λࢪͨ͠΄ ͔ɺύεϫʔυʹґଘ͠ͳ͍৽ͨͳೝূ ํࣜʮ8FC"VUIOʯʹσϑΥϧτͰରԠ ͢Δɻ தུ ࢦ໲΍εϚʔτϑΥϯʹอ ଘ͞Εͨإը૾ͷΑ͏ͳੜମೝূ৘ใɺ ͋Δ͍͸:VCJLFZͷೝূσόΠεͷΑ͏ ͳ64#ϋʔυ΢ΣΞΛར༻ͯ͠΢Σϒα ΠτʹαΠϯΞοϓ͢ΔखஈΛఏڙ͢ Δɻz

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© OSCA ೥݄೔1VCMJDLFZ ϚΠΫϩιϑτɺ8FC"VUIOΛ&EHFʹ࣮૷ɻύεϫʔυෆཁɺੜମೝূ΍1*/Ͱ 8FCαΠτ΁ϩάΠϯՄೳʹɻ೥ळͷ8JOEPXTΞοϓσʔτͰ IUUQTXXXQVCMJDLFZKQCMPHXFCBVUIOFEHFQJOXFCXJOEPXT@IUNM lϚΠΫϩιϑτ͸ɺ೥݄ࠒʹ༧ ఆ͞Ε͍ͯΔ8JOEPXTͷେܕΞοϓ σʔτʢ34ʣʹ޲͚ͯ։ൃதͷ࠷৽Ϗ ϧυɺ8JOEPXTCVJMEͰɺ ύεϫʔυෆཁͰ8FCαΠτʹϩάΠϯ Ͱ͖Δඪ४࢓༷ʮ8FC"VUIOʯΛ .JDSPTPGU&EHFʹ࣮૷ͨ͜͠ͱΛ໌Β ͔ʹ͠·ͨ͠ɻz

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© OSCA ೥݄೔1VCMJDLFZ $ISPNF͔Βɺ8FC"VUIOͰ.BDͷ5PVDI*%ͱ"OESPJEͷࢦ໲ೝূ͕σϑΥϧ τͰར༻Մೳʹɻ8FCαΠτ΁ͷϩάΠϯ΋λονͰ IUUQTXXXQVCMJDLFZKQCMPHDISPNF@XFCBVUIONBDUPVDIJEBOESPJEIUNM l(PPHMF͸݄ʹϦϦʔεͨ͠$ISPNF Ͱ8FC"VUIO΁ͷରԠΛߦ͍·ͨ͠ ͕ɺ݄ʹϦϦʔε͞ΕΔ$ISPNF Ͱ͸࣮૷ΛਐԽͤ͞ɺσϑΥϧτͰ.BD ͷ5PVDI*%ͱ"OESPJEͷࢦ໲ೝূʹରԠ ͢Δ͜ͱΛ໌Β͔ʹ͠·ͨ͠ɻz

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© OSCA ೥݄೔Ϡϑʔגࣜձࣾ Ϡϑʔɺ৽ͨͳ΢Σϒೝূͷن֨ʮ'*%0ʯͷ'*%0$FSUJGJFEʢೝఆʣΛࠃ಺ا ۀͰ།ҰऔಘɹύεϫʔυΛ࢖Θͳ͍҆શͳϩάΠϯ؀ڥͷ࣮ݱʹલਐ IUUQTBCPVUZBIPPDPKQQSSFMFBTFB lϠϑʔגࣜձࣾ͸ɺੜମೝূͳͲͷ࣍ੈ ୅ೝূͷඪ४ԽΛఏএ͢Δۀքஂମ '*%0ʢϑΝΠυʣΞϥΠΞϯεͷ৽ͨͳ ن֨ʮ'*%0ʯͷೝఆΛɺ೥݄ʹ ੈքͰॳΊͯ։࠵͞Εͨʮ'*%0ʯೝఆ ςετʹ͓͍ͯɺ͜ͷͨͼऔಘͨ͜͠ͱ Λ͓஌Βͤ͠·͢ɻࠃ಺اۀͰ͸།Ұͷ ೝఆऔಘͱͳΓ·͢ɻz

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© OSCA ೥݄೔Ϡϑʔגࣜձࣾ Ϡϑʔɺ"OESPJEεϚʔτϑΥϯͷ΢Σϒϒϥ΢βʔ্ͰͷϩάΠϯ͕ࢦ໲ೝূͳ ͲͷੜମೝূʹରԠ IUUQTBCPVUZBIPPDPKQQSSFMFBTFB l"OESPJEεϚʔτϑΥϯͷ΢Σϒϒϥ΢ βʔ্ʹ͓͍ͯɺϠϑʔͷαʔϏεʹࢦ ໲ೝূͳͲͷੜମೝূΛ࢖༻ͯ͠ϩάΠ ϯͰ͖ΔΑ͏ʹͳΓ·ͨ͠ɻz l·ͣ͸"OESPJEͷ୅දతͳ΢Σϒϒϥ΢ βʔͰ͋Δʮ(PPHMF$ISPNFʯʹରԠ ͍ͨ͠·͢ɻຊػೳ͸ɺ:BIPP+"1"/ *%ʹϩάΠϯ্ͨ͠Ͱɺੜମೝূͷઃఆ ʹɺ࢖༻͢Δ"OESPJEεϚʔτϑΥϯΛ ొ࿥͢Δ͜ͱͰར༻Ͱ͖·͢ɻz

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֤छϒϥ΢β͕ʮ8FC"VUIOʯʹରԠ © OSCA ೥݄೔ 'JSFGPY ೥݄೔ (PPHMF$ISPNF ·΋ͳ͘ .JDSPTPGU&EHF

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֤छϒϥ΢β͕ʮ8FC"VUIOʯʹରԠ © OSCA ೥݄೔ 'JSFGPY ೥݄೔ (PPHMF$ISPNF ·΋ͳ͘ .JDSPTPGU&EHF ύεϫʔυ͕ෆཁͷ ೝূํࣜΒ͍͠

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Ϡϑʔגࣜձࣾࠃ಺།Ұͷ'*%0ೝఆऔಘ © OSCA

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'*%0ΞϥΠΞϯε 'BTU*%FOUJUZ0OMJOF"MMJBODF © OSCA ੜମೝূΛϕʔεͱͨ͠ศརͰ҆શͳΦϯϥΠϯೝূΛ࣮ݱ ͢ΔͨΊʹɺ೥ʹ݁੒͞Εͨۀքஂମɻ <Ճໍஂମൈਮ> .JDSPTPGU (PPHMF "NB[PO .BTUFS$BSE 7*4" ෋࢜௨ υίϞ -*/& େ೔ຊҹ࡮ ָఱ ࡾඛ6'+ Ϡϑʔ

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8FC"VUIO΁ͷي੻ © OSCA 8$ʹ'*%0ͷ8FC"1*෦෼Λఏग़ɻ 8$8FC"VUIFOUJDBUJPOϫʔΩϯάάϧʔϓൃ଍ɻ 8FC"VUIFOUJDBUJPO 8FC"VUIO "1*קࠂީิʹɻ

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ύεϫʔυೝূͷ՝୊ © OSCA ଟ͘ͷ8&#αΠτͰར༻͞Ε͍ͯΔʮύεϫʔυೝূʯ͸ɺ ࣍ͷΑ͏ͳ՝୊͕͋Γ·͢ɻ ✓ ͓͔֮͑ͯͳ͍ͱ͍͚ͳ͍ ֮͑ΒΕͳ͍ ✓ ೖྗ͕໘౗͍͘͞ ✓ ࿙Ӯ͠΍͍͢ ✓ ࠶ར༻͕Մೳ རศੑ ҆શੑ

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ύεϫʔυೝূͷ՝୊ © OSCA ʮΞΧ΢ϯτʯͱʮύεϫʔυʯͷೝূͰ͸ɺωοτϫʔΫ தΛʮύεϫʔυʯ͕ྲྀΕͯ͠·͍ͬͯΔɻ tGb9T3hM!gLaThB14P ೝূ

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ύεϫʔυೝূͷ՝୊ © OSCA ΋ͬͱzศརzͰz҆શzͳ࢓૊Έ͕͋Ε͹ྑ͍ͷʹɾɾɾ

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৽͍͠ೝূͷ࢓૊Έ ֓ཁ © OSCA ➢ ύεϫʔυ େ੾ͳ΋ͷ ΛωοτϫʔΫதʹྲྀ͞ͳ͍ɻ tGb9T3hM!gLaThB14P

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৽͍͠ೝূͷ࢓૊Έ ֓ཁ © OSCA ➢ ύεϫʔυ େ੾ͳ΋ͷ ΛωοτϫʔΫதʹྲྀ͞ͳ͍ɻ ➢ ೝূ͸σόΠεଆͷzศརͳํ๏lͰߦ͏ɻ tGb9T3hM!gLaThB14P ೝূ

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৽͍͠ೝূͷ࢓૊Έ ֓ཁ © OSCA ➢ ύεϫʔυ େ੾ͳ΋ͷ ΛωοτϫʔΫதʹྲྀ͞ͳ͍ɻ ➢ ೝূ͸σόΠεଆͷzศརͳํ๏zͰߦ͏ɻ ➢ ೝূ݁ՌΛαʔόʔʹૹ৴͢Δɻ tGb9T3hM!gLaThB14P ೝূ݁Ռ ೝূ

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৽͍͠ೝূͷ࢓૊Έ ֓ཁ © OSCA ͜͜·Ͱͷઆ໌͚ͩͩͱ ʮೝূ݁ՌΛӕ͔ͭΕͨΒͲ͏͢ΔΜͩʁʯ ͱࢥ͑ͯ͠·͏͚Ͳɺͦ͜͸͔ͬ͠Γߟ͑ΒΕ͍ͯΔɻ

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ొ৔͢Δ΋ͷ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ʮೝূثʯʮϒϥ΢βʯʮαʔόʔʯ

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ొ৔͢Δ΋ͷ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ʮೝূثʯʮϒϥ΢βʯʮαʔόʔʯ ࢦ໲ηϯλʔ Χϝϥ 64#Ωʔ ͳͲ

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ొ৔͢Δ΋ͷ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ʮೝূثʯʮϒϥ΢βʯʮαʔόʔʯ 8FC"VUIOʹ ରԠͨ͠ϒϥ΢β

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ొ৔͢Δ΋ͷ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ೝূثͷʮൿີ伴ʯʮެ։伴ʯ ެ։伴҉߸ํࣜ ൿີ伴 ެ։伴

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ొ৔͢Δ΋ͷ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ೝূثͷʮൿີ伴ʯʮެ։伴ʯ ެ։伴҉߸ํࣜ ൿີ伴 ެ։伴 ೝূثݻ༗ͷ ൿີ伴ɾެ։伴Λ࣋ͭ

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ԡ͓͑ͯ͘͞΂͖ͭͷॲཧ © OSCA ೝূʹར༻͢Δೝূثͷొ࿥ ೝূثΛར༻ͨ͠ೝূ

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ೝূʹར༻͢Δೝূثͷొ࿥ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ϩάΠϯೝূͳͲͰར༻͍ͨ͠ೝূثΛɺ αʔϏεΛఏڙ͍ͯ͠Δαʔόʔʹొ࿥͠·͢ɻ

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ೝূʹར༻͢Δೝূثͷొ࿥ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ϩάΠϯೝূͳͲͰར༻͍ͨ͠ೝূثΛɺ αʔϏεΛఏڙ͍ͯ͠Δαʔόʔʹొ࿥͠·͢ɻ ࠓޙར༻͢Δೝূث Λڭ͑ͯʔʂ

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ೝূʹར༻͢Δೝূثͷొ࿥ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ϩάΠϯೝূͳͲͰར༻͍ͨ͠ೝূثΛɺ αʔϏεΛఏڙ͍ͯ͠Δαʔόʔʹొ࿥͠·͢ɻ ೝূث͝ͱͷॴఆͷ खஈͰɺϢʔβݕূ

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ೝূʹར༻͢Δೝূثͷొ࿥ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ϩάΠϯೝূͳͲͰར༻͍ͨ͠ೝূثΛɺ αʔϏεΛఏڙ͍ͯ͠Δαʔόʔʹొ࿥͠·͢ɻ ൿີ伴ɾެ։伴͕ੜ ੒͞ΕΔ ൿີ伴 ެ։伴

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ೝূʹར༻͢Δೝূثͷొ࿥ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ϩάΠϯೝূͳͲͰར༻͍ͨ͠ೝূثΛɺ αʔϏεΛఏڙ͍ͯ͠Δαʔόʔʹొ࿥͠·͢ɻ ެ։伴ͳͲΛؚΉ৘ ใΛૹΓฦ͢ɻ ൿີ伴 ެ։伴

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ೝূʹར༻͢Δೝূثͷొ࿥ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ϩάΠϯೝূͳͲͰར༻͍ͨ͠ೝূثΛɺ αʔϏεΛఏڙ͍ͯ͠Δαʔόʔʹొ࿥͠·͢ɻ Ϣʔβ৘ใͱެ։伴 Λඥ͚ͮΔɻ ʮྃղʂొ࿥ͨ͠ʂʯ ൿີ伴 ެ։伴

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ೝূثΛར༻ͨ͠ೝূ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ೝূ࣌͸ɺొ࿥ࡁΈͷೝূث͔Βͷ݁ՌΛ৴པ͢Ε͹ྑ͍ɻ ൿີ伴 ެ։伴 ೝূث͝ͱͷॴఆͷ खஈͰɺϢʔβݕূ

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ೝূثΛར༻ͨ͠ೝূ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ೝূ࣌͸ɺొ࿥ࡁΈͷೝূث͔Βͷ݁ՌΛ৴པ͢Ε͹ྑ͍ɻ ൿີ伴 ެ։伴 ೝূثͰͷೝূ݁Ռ Λൿີ伴Λར༻ͯ͠ॺ ໊͢Δɻ ೝূ݁Ռ

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ೝূثΛར༻ͨ͠ೝূ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ೝূ࣌͸ɺొ࿥ࡁΈͷೝূث͔Βͷ݁ՌΛ৴པ͢Ε͹ྑ͍ɻ ൿີ伴 ެ։伴 ॺ໊͞Εͨೝূ݁Ռ ΛૹΓฦ͢ɻ ೝূ݁Ռ

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ೝূثΛར༻ͨ͠ೝূ © OSCA ϒϥ΢β Web Authentication API αʔόʔ ೝূث "VUIFOUJDBUPS ೝূ࣌͸ɺొ࿥ࡁΈͷೝূث͔Βͷ݁ՌΛ৴པ͢Ε͹ྑ͍ɻ ൿີ伴 ެ։伴 ެ։伴Λར༻ͯ͠ɺ ೝূ݁ՌΛݕূ͠ɺ ໰୊ͳ͚Ε͹ϢʔβΛ ಛఆͰ͖Δɻ ೝূ݁Ռ

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·ͱΊ © OSCA ➢ ֤ϒϥ΢βͰ8FC"VUIFOUJDBUJPO"1* 8FC"VUIO ͷ࣮૷͕ਐΊΒΕ͍ͯΔ͜ͱͰɺϒϥ΢βͰ'*%0ೝূ͕ ࣮ݱͰ͖ΔΑ͏ʹͳ͖ͬͯͨɻ ➢ ࠃ಺Ͱ͸Ϡϑʔ͕͍ͪૣ͘ରԠΛߦͬͨɻ ➢ ೥͕ʮݩ೥ʯʹͳΔ͔΋ʂʁ