TLS1.3とは何か？

Transcript

1. 5-4ͱ͸Կ͔ʁ େ௡
   ൟथ
   גࣜձࣾ
   ΠϯλʔωοτΠχγΞςΟϒ
   **+ 1,*
   %BZ
   
   
2. ࣗݾ঺հ w גࣜձࣾΠϯλʔωοτΠχγΞςΟϒ **+
   ܦӦاըຊ ෦
   ഑৴ࣄۀਪਐ෦
   w /PEFKT
   $PSF
   5FDIOJDBM
   $PNNJUUFFϝϯόʔ
   DSZQUP
   UMT
   0QFO44-
   CJOEJOHΛ୲౰͍ͯ͠·͢
   w *&5'
   IUUQCJT
   8(Ͱ
   )551ͷ࢓༷ࡦఆʹࢀըɻ 5-4ʹ͸·ͩ௚઀ؔΘ͍ͬͯ·ͤΜɻ
   w ϒϩά
   IUUQEIBUFOBOFKQKPWJ
   Ͱ5-4पΓͷ ωλΛ৭ʑॻ͍͍ͯ·͢ɻ
3. ಺༰  5-4ͷ؆୯ͳྺ࢙
    8FCϓϩτίϧͷਐԽ
    5-4͕ٻΊΒΕΔഎܠ
    5-4ͱ͸Կ͔
   ͕࣌ؒ଍Γͳ͍ͷͰओཁ෦෼ͷΈ ຊൃද͸ɺ࣌఺ͷ࠷৽5-4υϥϑτ
   ESBGU ͱ*&5'ͷٞ࿦ͷ݁ՌΛҰ෦ؚΜ Ͱ͍·͢ɻ࠷ऴ࢓༷ͰมΘΔՄೳੑ͕͋Γ·͢ɻ
4. 5-4ͷ؆୯ͳྺ࢙ 44-
    ະൃද ೥ 44-
    ೥ 44-
    ೥ *&5'
   5-4
   8(
   ελʔτ ೥ 5-4
    ೥ 5-4
    ೥ 5-4
    ೥ 5-4
   ݕ౼ελʔτ ೥ 5-4
   ࢓༷Խ׬ྃʁ 44-͸چωοτεέʔϓࣾ ͷࢲతϓϩτίϧ େਓͷࣄ৘Ͱ໊শมߋ 44-ͱجຊઃܭ͸େ͖͘ม͑ͣվྑ ༷ʑͳػೳ֦ு ݄຤8(ϥετ ίʔϧ໨ඪ %308/ 100%-& #&"45
5. 8FCϓϩτίϧͷਐԽ 5-4ͷҐஔ෇͚
6. 8FCϓϩτίϧͷਐԽ 5$1 5-4
    *1 WW &UIFSOFU )551 )551ͷ࣌୅ ʙ
   5-4
   ʙ
   5-4
   ʙ
7. 8FCϓϩτίϧͷਐԽ 5$1 5-4
    *1 WW &UIFSOFU )551ηϚϯςΟΫε 5$1 *1 WW &UIFSOFU 5-4
    41%:
    )551ηϚϯςΟΫε )551 )551͔Β)551΁ ʙ ʙ ϒϥ΢β͸ฏจ ௨৴Λඇαϙʔτ
8. 8FCϓϩτίϧͷਐԽ 26*$ *1 WW 5$1 6%1 5-4
    &UIFSOFU )551ηϚϯςΟΫε )551 26*$҉߸ϓϩτίϧ ʙ
   )551
   ʙ )551͔Β26*$΁ ಠࣗ҉߸ ϓϩτίϧ
9. 8FCϓϩτίϧͷਐԽ 26*$ *1 WW 5$1 6%1 &UIFSOFU 5-4
    )551ηϚϯςΟΫε )551ʙʁ ࠓ೔ͷओ୊ 26*$͔Β5-4΁ 
   PS
   ʙ ౷Ұ͞ΕΔ༧ఆ
10. 5-4͕ٻΊΒΕΔഎܠ  Πϯλʔωοτ؀ڥͷมԽ
    w εϊʔσϯࣄ݅ɺ-BWBCJUαʔϏεఀࢭ
    w ৽ϓϩτίϧ )551
    26*$
    w ͦͷଞ ར༻؀ڥͷมԽɺαʔϏεͷଟ༷Խ
     5-4ͷݶք
    w ༷ʑͳٕज़ෛ࠴ͷ஝ੵ ৗ࣌5-4
11. Πϯλʔωοτ؀ڥͷมԽ
12. Πϯλʔωοτ؀ڥͷมԽ w ถ/4"ʹΑΔ
    QFSWBTJWF
    TVSWFJMMBODF ޿ൣғͷ౪ ௌߦҝ ͕໌Β͔ʹͳΔɻ
    w ैདྷ͜͜·ͰͰ͖ͳ͍ͩΖ͏ͱࢥΘΕ͍ͯͨൣғ· Ͱ࣮ߦɻ
    w -PHKBN
    ࠃՈ༧ࢉϨϕϧͰCJUT
    %)&Λղಡ εϊʔσϯࣄ݅
13. Πϯλʔωοτ؀ڥͷมԽ w εϊʔσϯࣄ݅ͷ༨೾Ͱࡋ൑ॴΑΓϝʔϧαʔϏε ͷ5-4ൿີ伴ͷఏग़໋ྩΛड͚Δɻ
    w ҉߸Խ͞ΕͨσʔλͰ͋ͬͯ΋σʔλอଘʴൿີ伴 ։໋ࣔྩʹΑͬͯ෮߸Խ͞ΕΔڪΕ͕ݱ࣮ʹɻ
    w 'PSXBSE
    4FDSFDZͷಋೖ͕ҰؾʹਐΉɻ -BWBCJUαʔϏεఀࢭ
14. Πϯλʔωοτ؀ڥͷมԽ w ओཁϒϥ΢βʔ͸5-4௨৴ͷΈ)551Λαϙʔτ
    w )551
    3'$ Ͱ͸ɺ5-4ͷར༻҉߸Λݫ੍͘͠ ݶɻछྨͷ҉߸ํࣜΛϒϥοΫϦετͱͯ͠ܝࡌ͠ ͯར༻ෆՄɻ
    w ͦͷ੍ݶͷଟ͘͸ɺ5-4Λલ౗͠ͰదԠ ৽ϓϩτίϧ )551 OHJOYͷσϑΥϧτ҉߸ํࣜΛ࢖͏ ͱ)551઀ଓ͸ΤϥʔʹͳΓ·͢ɻ
15. Πϯλʔωοτ؀ڥͷมԽ w (PPHMF͕ಠࣗʹ։ൃ͍ͯ͠Δϓϩτίϧ
    w 6%1্Ͱ5$1 5-4૬౰ ЋͷػೳΛ࣮ݱ
    w 355ʹΑΔߴ଎઀ଓ (PPHMFͰׂ߹
    w (PPHMFͷશαʔϏεͰӡ༻த
    w 'BDFCPPL͸ϞόΠϧΞϓϦͰ5$1্ͷ26*$҉ ߸Λࢼݧத
    w -*/&΋26*$ར༻Λࢼݧத ৽ϓϩτίϧ 26*$
16. Πϯλʔωοτ؀ڥͷมԽ 26*$ʹΑΔ355ʹΑΔߴ଎઀ଓ ҉߸Խ͞ΕͨΞϓϦͷσʔλ (&5
    
    )551 $)-0 ϋϯυγΣΠΫ લճར༻ͨ͠伴 ࠶઀ଓͷࡍʹ͸ϋϯυγΣΠΫ׬ྃΛ଴ͨͣɺҎલͷ઀ଓ Ͱར༻ͨ͠伴Λ࢖ͬͯΞϓϦσʔλΛ҉߸Խ͠ૹ৴͢Δ 4)-0
17. Πϯλʔωοτ؀ڥͷมԽ ͦͷଞ ಋೖίετͷ௿ݮ -FU`T
    &ODSZQUͷແྉ%7ূ໌ॻ ੑೳ޲্ "&4/*ʹΑΔ$16҉߸ॲཧೳྗͷ޲্ ΠϯϑϥෛՙͷมԽ )551ʹΑΔ઀ଓू໿ ఏڙαʔϏεͷଟ༷Խ Ϛϧνςφϯτ$%/ ϒϥ΢βͷํ਑ 'JSFGPY ඇ҉߸Խ઀ଓͷஈ֊తഇࢭɺػೳ੍ݶͷํ਑
18. 5-4ͷݶք
19. 5-4ͷݶք w ݱࡏͷ5-4Ͱఆٛ͞Ε͍ͯΔز͔ͭͷػೳɾ߲໨ ͸ɺطʹແ৚݅Ͱར༻͢ΔͱةݥͰ͋Δɻ
    w 3'$ 5-4%5-4ͷ҆શͳར༻ͷͨΊͷਪ঑ʣ
    w աڈ༷ʑͳ5-4ͷ߈ܸख๏΍੬ऑੑ͕ެ։͞Εɺͦͷ ౓ରࡦ͕औΒΕ͖ͯͨɻ
    w ͔͠͠ػೳͷແޮԽ΍֦ுػೳͷ௥ՃͳͲBE
    IPDͳର ࡦͰࠜຊతɾൈຊతͳରࡦʹͳ͍ͬͯͳ͍΋ͷ΋ଟ͍ɻ
20. 5-4ͷݶք
    ҉߸ํࣜͷةຆԽ طʹे෼҆શͱ͸ݴ͑ͳ͍҉߸ํࣜͷαϙʔτ͕࢓༷ Ͱنఆ͞Ε͓ͯΓɺߋ৽͕ඞཁɻ %&4 /*45
    '14ͷഇࢭ ೥·Ͱڐ༰ 3$ 3'$ 1SPIJCJUJOH
    3$
    $JQIFS
    4VJUFT .% 4-05)߈ܸ $7& 4)" 'SFFTUBSU
    $PMMJTJPO
21. 5-4ͷݶք
    ҉߸ڧ౓ͷةຆԽ w '3&",
    MPHKBNɿ
    ղಡख๏ͷޮ཰Խɺܭࢉࢿݯͷߴ౓Խ ʹΑΓे෼҆શͱΈͳ͞ΕΔ҉߸ڧ౓͕ߴ͘ͳͬͨɻεϊʔ σϯࣄ݅ͰࠃՈ༧ࢉϨϕϧͷܭࢉࢿݯ΋ڴҖͱͳΔ࣌୅ɻ
    w /*45
    41
    "
    SFW
    &$3:15
    **ਪ঑ɿ
    ֤छஂମʹ ΑΔࢦඪͱ5-4 3'$Ͱαϙʔτ͍ͯ͠Δ҉߸ͷ தʹCJUҎԼͷ&$%)ͳͲطʹڧ౓ෆ଍ͷ΋ͷؚ͕· Ε͍ͯΔɻ
    w /*45҉߸΁ͷٙٛɿ%VBM@&$@%3#(ͷόοΫυΞ໰୊
22. 5-4ͷݶք
    ҉߸ख๏ͷ҆શੑ w ."$UIFO&ODSZQU FH
    $#$
    NPEF ͷ҆શੑʹର͢Δٙ໰
    w աڈ
    #&"451BEEJOH
    0SBDMF߈ܸ-VDLZ
    5IJSUFFO౳ͷ ߈ܸର৅ɻࠓޙ΋ग़ͯ͘Δ͜ͱ͕༧૝͞ΕΔɻ
    w #MPDL$JQIFSͷݶքɺ4USFBN
    $JQIFS 3$ ͷةຆԽ 5-4͸"&"% ೝূ͖ͭ҉߸ ͷΈ ҉߸Խ
    ฏจʴύσΟϯά ."$
23. 5-4ͷݶք
    3FOFHPUJBUJPO w 5-4ϋϯυγΣΠΫ׬ྃޙʹ઀ଓΛҡ࣋ͨ͠··࠶ ౓ϋϯυγΣΠΫΛߦ͏ػೳɻΫϥΠΞϯτೝূ΁ ͷભҠ΍伴ߋ৽ͷͨΊʹඞཁɻ
    w աڈ͍Ζ͍Ζͳ߈ܸର৅ͱͳͬͨɻ3FOFHPUJBUJPO લޙͰηογϣϯͷҾ͖ܧ͕͗೉͍͜͠ͱ͕ىҼ 5-4Ͱഇࢭ ϋϯυγΣΠΫ ࠶ϋϯυγΣΠΫ
24. 5-4ͷݶք
    $PNQSFTTJPO w 5-4ͷσʔλΛѹॖ͔ͯ͠Β҉߸Խ͢Δػೳɻϋϯ υγΣΠΫ࣌ʹѹॖํࣜΛ߹ҙ͢Δɻ
    w ѹॖαΠυνϟωϧ߈ܸɿ
    σʔλѹॖʹΑΔαΠ ζมߋΛख͕͔Γͱͯ͠҉߸Խ৘ใΛ࿙Ӯͤ͞Δख ๏ $3*.&5*.&#3&"$) 5-4Ͱഇࢭ "Y """""""""
25. 5-4ͷݶք
    4FTTJPO*%
    5JDLFU w Ҏલͷ5-4ηογϣϯ৘ใΛҾ͖ܧ͍Ͱ࠶઀ଓΛߦ ͏ػೳ
    w ڞ༗ͷࡍͷ৚͕݅؁͍ͱೝূόΠύεͷ੬ऑੑ 5-4Ͱഇࢭ
    14, 1SF4IBSF,FZ ํࣜʹ౷Ұ 4FTTJPO*%
    5JDLFU
26. 5-4ͷݶք
    伴ަ׵ͷ$SPTT1SPUPDPM߈ܸ w .J5.Ͱ5-4ͷ&$%)伴ަ׵Λ%)伴ަ׵ʹΈͳͯ͠Ϋ ϥΠΞϯτʹૹ෇ͤ͞Δ߈ܸ
    w ?ఔ౓ͷ֬཰ͰQSF
    NBTUFS
    TFDSFUͷ伴ղಡ͕੒ޭ
    w 5-4Ͱ͸ύϥϝʔλʹΑΔ伴ަ׵Λഇࢭɻ໊લ෇͖ύϥ ϝʔλར༻ʹ੍ݶɺॺ໊Ληογϣϯϋογϡʹมߋͨ͠ɻ
    ηογϣϯϋογϡɿͦΕ·Ͱ΍ΓऔΓͨ͠શϋϯυγΣΠΫσʔλΛར༻ͯ͠ϋογϡ஋Λੜ੒͢Δํ๏ &$%)&
    4FSWSFS,FZ&YDIBOHF %)&
    4FSWSFS,FZ&YDIBOHF
27. 5-4ͷݶք
    ,FZ
    %FWJBUJPO w ϋϯυγΣΠΫσʔλ͔Βରশ҉߸ͷൿີ伴΍."$ 伴Λੜ੒͢Δํࣜ
    w 5SJQMF)BOETIBLF߈ܸɿ.J5.ͰOPODFΛૢ࡞ͯ͠ಉ ͡NBTUFS
    TFDSFUΛ࣋ͭ̎ͭͷ5-4઀ଓΛཱ֬ɻ 3FOFHPUJBUJPOΛ༠ൃͤͯ͞ѱҙͷ͋ΔσʔλΛૹΓ ࠐΉ߈ܸख๏ 5-4͸ηογϣϯϋογϡΛ༻͍ͨ
    NBTUFS
    TFDSFU
    ʹมߋ NBTUFS
    TFDSFU NBTUFS
    TFDSFU
28. 5-4ͱ͸Կ͔ʁ ࣌ؒͷ౎߹্໢ཏతɾৄࡉͳ࢓༷಺༰·Ͱ౿ΈࠐΈ·ͤΜ
29. 5-4ͷ໨త  ϋϯυγΣΠΫσʔλΛͰ͖Δ͚ͩ҉߸Խͯ͠ൿಗ͢Δ
     ϋϯυγΣΠΫϨΠςϯγʔͷ࡟ݮ
    w ࠶઀ଓͷ৔߹͸
    355
    w ৽ن઀ଓͷ৔߹͸ɺ355
    355
     ϋϯυγΣΠΫͰަ׵͢Δ߲໨ͷݟ௚͠ɺ؆ૉԽ
     Ϩίʔυ૚҉߸Խͷݟ௚͠ 3$ഇࢭɺ$#$ෆ࠾༻౳
30. 5-4ͷಛ௃ 
    ༷ʑͳػೳɺ߲໨ͷݟ௚͠ɾഇࢭ
    ࣌୅ʹ߹Θͳ͘ͳͬͨ΋ͷɺΑΓޮ཰తʹมߋमਖ਼Ͱ͖Δ΋ͷΛ 5-4͔Βػೳɾ߲໨Λ਺ଟ͘ഇࢭ
     ΑΓηΩϡΞʹ
    ฏจ௨৴͕ඞཁͳ෦෼Λۃྗগͳͯ͘͠৘ใΛൿಗ
    "&"%΍ύσΟϯάͳͲকདྷతͳ߈ܸʹඋ͑Δ
     ੑೳ޲্
    355
    355઀ଓʹΑΔੑೳ޲্
31. ΋͏ϝδϟʔόʔδϣϯΞοϓͱಉ͡վม
    5-4ͷओͳഇࢭ߲໨
     ػೳ $PNQSFTTJPO $3*.&5*.&ରࡦ 3FOFHPUJBUJPO 1PTU)BOETIBLFʹஔ͖׵͑ 4FTTJPO*%
    5JDLFU 14,ʹஔ͖׵͑ ҉߸ํࣜ .%
    4)"
    4)" ةຆԽɺ௿ڧ౓ରࡦ %4" ར༻༻్ͷݮগ OPO"&"% $#$
    3$ ةຆԽɺ߈ܸϦεΫͷ௿ݮ *7ϑΟʔϧυ OPODF࠶ར༻ϦεΫͷഉআ DVTUPN
    %)& $SPTT1SPUPDPM߈ܸରࡦ &$%)&
    DPNQSFTT
    GPSNBU ར༻༻్ͷݟ௚͠ɺ؆ૉԽ BOPOZNPVT
    %) 3'$ SBX
    QVC
    LFZ Λ୅༻
32. ΋͏ϝδϟʔόʔδϣϯΞοϓͱಉ͡վม
    5-4ͷओͳഇࢭ߲໨
     ϋϯυγ ΣΠΫ SFDPSE
    MBZFSͷόʔδϣϯ ޙํޓ׵ͷͨΊ͚ͩʹҡ࣋ SBOEPNதͷ࣌ࠁσʔλ ཚ਺ੜ੒͕ߴ౓Խ͠ҙຯ͕ͳ͘ͳͬͨ 1'414,Ҏ֎ͷ伴ަ׵ ൿີ伴ͷةຆԽରࡦ 44-ͷαϙʔτ ةຆԽͨ͠ϓϩτίϧͷαϙʔτഇࢭ $IBOHF$JQIFS4QFD 伴ަ׵௚ޙʹ҉߸Խ։࢝ 4FSWFS$MJFOU,FZ
    &YDIBOHF $MJFOU4FSWFS)FMMP֦ுʹҠಈ ֦ுػೳ NBY@GSBHNFOU@MFOHUI ?ʹ࠷େ஋Λݻఆ USVODBUFE@INBD "&"%Ͱͷར༻ෆՄɺ҆શͰ͸ͳ͍
33. ͳͥ5-4͡Όͳ͍ͷ͔ w 44--BCͷௐࠪͰ͸ɺ5-4Ϩίʔυ૚ͷόʔδϣϯ͕ɺ ͷ৔߹͸ɺͷ৔߹͸Ҏ্ͷ5-4αʔό ͕઀ଓΛڋ൱͢Δɻ 0QFO44-ͷιʔε ΫϥΠΞϯτ͕5-4Y͕ΦϑΝʔͨ͠ ΒͱΓ͋͑ͣ5-4ͱͯ͠ѻ͏
34. 5-4
    WT
    
    ॳظ઀ଓܗଶͷҧ͍ɺߴ଎Խ ઀ଓ 5-4
     5-4
     355 /" ࠶઀ଓ14,
    ʢΫϥΠΞϯτೝূ͸ෆՄ 355 /" ৽ن઀ଓ αʔόଆൃ৴ 355 ࠶઀ଓ ৽ن઀ଓ 355 ৽ن઀ଓ ҉߸ํࣜͷෆ߹ҙ࣌ ߴ଎Խ ߴ ଎ Խ 355͕ൺֱతେ͖͍ϞόΠϧ؀ڥͷੑೳվળ
35. 5-4ͷϋϯυγΣΠΫ
    355 ClientHello ServerHello Certificate ServerHelloDone ClientKeyExchange ChangeCipherSpec Finished ChangeCipherSpec Finished Application Data Application Data 355 355 355 355 ҉߸Խൣғ ̎—355
36. 5-4ͷϋϯυγΣΠΫ
     355 ClientHello ServerHello EncryptedExtension ServerConfiguration Certificate CertificateVerify Finished ApplicationData Finished Application Data Application Data 355 355 355 ҉߸Խൣғ 355 355
37. 5-4ͷϋϯυγΣΠΫ
    355 ClientHello Finished ApplicationData end_of_early_data ServerHello EncryptedExtension ServerConfiguration Certificate CertificateVerify Finished ApplicationData 355 355 ҉߸Խൣғ 355 1SF4IBSFE ,FZ 1SF4IBSFE ,FZ 355ͷσʔλ͸3FQMZ߈ܸରࡦͷͨΊσʔλͷႈ౳ੑ͕ඞཁɻ ઐ༻"1*Λ༻ҙͯ͠ΞϓϦଆͰ୲อ͢Δɻ
38. 5-4ͷ҉߸ํࣜ 伴ަ׵ &$%)&
    %)&
    14, TFDQS
    Y
    Y
    ⒎EIF ೝূ 34"
    &$%4"
    14, STB@QLDT@TIB
    FDETB@TFDQS@TIB
    STB@QTT@TIB
    FE
    FE ରশ҉߸ "&"% "&4($.
    $IB$IB1PMZ
    "&4$$. ),%'
    ϋογϡ 4)" 4)"͸·ͩͰ͢ɻ %+#
    DVSWF Τυϫʔυۂઢ ੺ࣈ͸.5* .VTU
    5P
    *NQMFNFOU ϋϯυγΣΠΫॺ ໊͸144ͷΈ
39. 5-4
    
    ϗοτͳٞ࿦
    &$ %)&
    355ͷෆ࠾༻ w 26*$Ͱ͸αʔό͔ΒTFNJTUBUJD伴Λ༧ΊΫϥΠΞϯτ ʹૹ෇͠ɺ355઀ଓ࣌ʹσʔλΛ҉߸Խ͢Δɻ
    w αʔόͷTFNJTUBUJD伴͸ΫϥΠΞϯτͰͷ؅ཧָ͕
    w %/4ͰTFNJTUBUJD伴Λެ։͢Ε͹ॳظ઀ଓͰ΋355Ͱ ͖Δɻ HT HY 355
    ҉߸Խσʔλ T ͇
40. 5-4
    
    ϗοτͳٞ࿦
    &$ %)&
    355ͷෆ࠾༻ w TFNJTUBUJDൿີ伴͕ةຆԽͨ͠৔߹ʹ'PSXBSE
    4FDSFDZ͕ഁΒΕΔ
    w ٞ࿦ͷ݁Ռɺ &$ %)&
    CBTFE
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