container-seccomp

2022/03/09 OCHaCafe5 #3 Kubernetes のセキュリティ
コンテナセキュリティにおける権限制御
〜Seccompとかよくわからんけどとりあえずこれくらいはやっておこう〜

セッション動画
https://ochacafe.connpass.com/event/238355/

1. 
   
   !NPDIJ[VLJ ίϯςφηΩϡϦςΟʹ͓͚Δݖݶ੍ޚ
   ʙ4FDDPNQͱ͔Α͘Θ͔ΒΜ͚ͲͱΓ͋͑ͣ͜Ε͘Β͍͸΍͓ͬͯ͜͏ʙ 0$)B$BGF
   
   ,VCFSOFUFT
   ͷηΩϡϦςΟ
2. !NPDIJ[VLJ /BNF
   ɹ,FJUB
   .PDIJ[VLJʢNPDIJ[VLJʣ
   
   XIPBNJ
3. /BNF
   ɹ,FJUB
   .PDIJ[VLJʢNPDIJ[VLJʣ
   
   XIPBNJ ͨ͵͖Ͱ͸ͳ͘
   ͖ͭͶͰ͢ɻ !NPDIJ[VLJ
4. ʹߦΘΕͨ$MPVE/BUJWF
   %BZT
   ʹͯొஃ͠ɺ
   ίϯςφηΩϡϦςΟʹؔ͢Δ͓࿩Λͤͯ͞௖͖·ͨ͠ɻ ಈը
   IUUQTFWFOUDMPVEOBUJWFEBZTKQDOEUUBMLT
   ࢿྉ
   IUUQTTQFBLFSEFDLDPNNPDIJ[VLJDPOUBJOFSEFWTFDVSJUZ ݟͯͶʂ
   XIPBNJ
5. 
   ͸͡Ίʹ ίϯςφͷηΩϡϦςΟΛߟ͑Δ্Ͱ͸ͦͷ࢓૊Έ্ɺ
   ίϯςφʹର͢Δݖݶ੍ޚΛཧղ͢Δ͜ͱ͕ॏཁͰ͢ɻ
   ຊ೔͸ݖݶ੍ޚͷதͰ΋ಛʹ4FDDPNQʹΑΔίϯςφϓϩηε͔ΒͷγεςϜίʔϧͷ
   ࣮ߦ੍ޚʹείʔϓΛ౰ͯɺͦͷجૅతͳ෦෼ʹؔ͢Δ͓࿩Λͤͯ͞௖͖·͢ɻ
6. ɾຊൃද͸αΠόʔ߈ܸΛߠఆ͢Δ΋ͷͰ͸͋Γ·ͤΜ
   ɾൃද಺Ͱ༻͍Δίϯςφͱ͍͏ݴ༿͸جຊతʹSVODͰ࣮ߦ͞ΕΔίϯςφΛࢦ͠·͢
   ɾܝࡌ಺༰͸ݸਓͷݟղͰ͋Γɺॴଐ͢Δاۀ΍૊৫ͷཱ৔ɺઓུɺҙݟΛ୅ද͢Δ΋ͷͰ͸͋Γ·ͤΜ
   ɾهࡌ͞Ε͍ͯΔձ໊ࣾɺ঎඼໊ɺ·ͨ͸αʔϏε໊͸ɺ֤ࣾͷ঎ඪొ࿥·ͨ͸঎ඪͰ͢
   ͸͡Ίʹ
7. 
   "HFOEB 
   ίϯςφͷִ཭
   
   ίϯςφʹ͓͚Δݖݶ੍ޚ
   
   γεςϜίʔϧͱ4FDDPNQ
   
   ,VCFSOFUFTʹ͓͚Δ4FDDPNQ
   
   ·ͱΊ
8. 
   
   ίϯςφͷִ཭ ίϯςφͷ࣮ଶ͸Χʔωϧ্Ͱ࣮ߦ͞ΕΔϓϩηεͰ͢ɻ 04 ,FSOFM 1SPDFTT 1SPDFTT 1SPDFTT
9. 
   
   ίϯςφͷִ཭ 04 ,FSOFM ίϯςφͷ࣮ଶ͸Χʔωϧ্Ͱ࣮ߦ͞ΕΔϓϩηεͰ͢ɻ
   ίϯςφʹ͋ͨΔϓϩηε͕Χʔωϧͷ༷࣋ͭʑͳػೳʹΑΓִ཭͞ΕΔ͜ͱͰɺίϯςφͱͯ͠ͷػೳ͕࣮ݱ͞Ε·͢ɻ 1SPDFTT SPPUGT 1SPDFTT SPPUGT 1SPDFTT SPPUGT ࣮ߦۭؒʢFY
   /BNFTQBDFɺQJWPU@SPPUʣ
   ɹϓϩηε͕ಈ࡞͢Δ؀ڥΛִ཭͔͋ͨ͠΋୯ମͰಈ͍͍ͯΔΑ͏ʹݟ͔͚ͤΔ
   Ϧιʔε࢖༻ྔʢFY
   $HSPVQʣ
   ɹϓϩηε͕࢖༻Ͱ͖ΔϦιʔεྔʢ$16 .FNPSZͳͲʣΛ੍ݶ͢Δ
   ݖݶʢޙड़ʣ
   ɹϓϩηεͷΧʔωϧʹର͢Δૢ࡞Λ੍ݶ͢Δ ίϯςφ
10. 
    
    ίϯςφʹ͓͚Δݖݶ੍ޚ ࣮ߦۭؒͷִ཭΍Ϧιʔε࢖༻ྔͷ੍ݶ͚ͩͰ͸ίϯςφϓϩηε͸04ʹର࣮ͯ͠ߦϢʔβʔ૬౰ͷݖݶΛ࣋ͭ͜ͱʹͳΓ·͢ɻ
    ˞ྫ͑͹ίϯςφΛಛʹҙࣝͤͣʹ࣮ߦͨ͠৔߹ɺίϯςφϓϩηε͸σϑΥϧτͷ࣮ߦϢʔβʔͰ͋ΔSPPUݖݶΛ࣋ͭ͜ͱʹͳΔ
    ίϯςφϓϩηε͕ա৒ͳݖݶΛ͍࣋ͬͯΔͱɺྫ͑͹ίϯςφͷִ཭؀ڥ͔Β֎෦ʹӨڹΛٴ΅͢ͱ͍ͬͨ
    ηΩϡϦςΟϦεΫʹܨ͕Γ·͢ɻʢFY
    $POUBJOFS
    #SFBL0VUʣ 04 ,FSOFM 1SPDFTT SPPUGT 1SPDFTT 1SPDFTT SPPU VTFS SPPU 04ʹରͯ͠
    ಛݖϢʔβʔ૬౰ͷ
    ͢΂ͷૢ࡞͕Մೳ 04ʹରͯ͠
    ҰൠϢʔβʔ૬౰ͷ
    ૢ࡞͕Մೳ ʢຊ೔͸ѻΘͳ͍͚Ͳॏཁͳʣิ଍
    ࣮ࡍͷͱ͜ΖίϯςφͰ͸ա౓ͳݖݶ͕ϓϩηεʹ෇༩͞ΕΔ͜ͱͷͳ͍Α͏ɺޙड़ͷ௨Γ༷ʑͳ࢓૊ΈΛ༻͍Δ͜ͱͰݖݶ੍ޚΛߦ͍ͬͯ·͢ɻ
    ͱ͸ݴ͑ίϯςφϓϩηε͕SPPUݖݶͰ࣮ߦ͞ΕΔ͜ͱ͸ҰൠతʹϦεΫͱΈͳ͞Ε͓ͯΓɺίϯςφ࣮ߦ࣌͸໌֬ʹඇಛݖϢʔβʔΛࢦఆ͢Δ͜ͱ͕
    ϕετϓϥΫςΟεͱ͞Ε͍ͯ·͢ɻ 04ʹରͯ͠
    ಛݖϢʔβʔ૬౰ͷ
    ͢΂ͷૢ࡞͕Մೳ ίϯςφʢݖݶ੍ޚͳ͠ʣ
11. 
    
    ίϯςφʹ͓͚Δݖݶ੍ޚ ͦ͜ͰίϯςφͰ͸-JOVYΧʔωϧͷ࣋ͭҎԼͷΑ͏ͳػೳΛ༻͍Δ͜ͱͰɺίϯςφϓϩηε͔ΒΧʔωϧʹର͢Δૢ࡞Λ੍ݶ ͢Δ࢓૊ΈΛ࠾༻͍ͯ͠·͢ɻ 3FBE0OMZ
    .PVOU $BQBCJMJUZ -4.
    "QQ"SNPS4&-JOVY 4FDDPNQ ػೳ
    ֓ཁ ಛఆͷϑΝΠϧγεςϜΛ3FBE0OMZͱ͠ ͯϚ΢ϯτ͢Δ࢓૊Έɻ SPPUϢʔβʔͷ࣋ͭݖݶʢಛݖʣΛࡉ෼ Խ͠ɺඞཁͳݖݶͷΈΛϓϩηεʹ෇༩ ͢Δ࢓૊Έɻ ϓϩηε͔ΒͷϑΝΠϧΞΫηεΛ੍ݶ͢Δ ࢓૊Έɻ
    ڧ੍ΞΫηε੍ޚͱݺ͹ΕDIPXO΍DINPE ʢ೚ҙΞΫηε੍ޚʣͷΑ͏ʹద༻͞Ε੍ͨ ݶΛมߋͰ͖ͳ͍ɻ ϓϩηε͔ΒΧʔωϧʹରͯ͠ൃߦͰ͖ ΔγεςϜίʔϧΛ੍ݶ͢Δ࢓૊Έɻ LTʹ͓͚Δ
    ద༻ঢ়گ 1PEσϓϩΠ࣌ʹಛఆͷϑΝΠϧγεςϜ ΛσϑΥϧτͰ30ͱͯ͠Ϛ΢ϯτ͢Δɻ ʢQSPD TZTGT DHSPVQʣ
    ˞EFWͳͲϗετͱϑΝΠϧγεςϜΛ ෼͚ͯӅṭ͢Δέʔε΋͋Δ 1PEσϓϩΠ࣌ʹίϯςφϓϩηεʹର ͯ͠σϑΥϧτͰ࠷௿ݶඞཁͳݖݶͷΈ Λ෇༩͢Δ 1PEσϓϩΠ࣌ʹσϑΥϧτͰ੍ޚ͕ద༻͞ ΕΔɻ
    ˞$3*΍ίϯςφϗετͷઃఆ࣍ୈͰ͸͋Δ ͕ɺ௨ৗ$3*σϑΥϧτͷ಺༰͕ద༻͞ΕΔ
    1PEσϓϩΠ࣌ʹ೚ҙͷઃఆΛ౉͢͜ͱ Ͱద༻Մೳɻ
    σϑΥϧτͰ͸੍ޚ͕ద༻͞Εͳ͍ɻ $PO fi HVSF
    B
    4FDVSJUZ
    $POUFYU
    GPS
    B
    1PE
    PS
    $POUBJOFS
    IUUQTLVCFSOFUFTJPEPDTUBTLTDPO fi HVSFQPEDPOUBJOFSTFDVSJUZDPOUFYU ˞ҼΈʹ%PDLFS΍1PENBOͰίϯςφΛσϓϩΠ͢Δ৔߹͸σϑΥϧτͰ4FDDPNQ͕ద༻͞Ε·͢
    ɹIUUQTEPDTEPDLFSDPNFOHJOFTFDVSJUZTFDDPNQ
    ɹIUUQTEPDTQPENBOJPFOMBUFTUNBSLEPXOQPENBOSVOIUNM IJHIMJHIUTFDDPNQTFDDPNQQPMJDZQPMJDZ
12. 
    
    γεςϜίʔϧͱ4FDDPNQ 🤔 ͦ΋ͦ΋4FDDPNQͬͯԿʁʁ σϑΥϧτͰద༻͞Εͳ͍ͷʹඞཁʁʁ
13. γεςϜίʔϧ
    ϓϩηε͕ಈ࡞͢Δ্ͰଞͷϓϩηεΛૢ࡞ͨ͠ΓϦιʔεʹΞΫηε͢Δࡍ͸ɺ
    γεςϜίʔϧͱݺ͹ΕΔ໋ྩΛΧʔωϧʹରͯ͠ൃߦ͢Δ͜ͱͰͦͷૢ࡞Λ࣮ݱ͠·͢ɻ
    
    γεςϜίʔϧͱ4FDDPNQ VCVOUVVTFS!VCVOUVTFSWFSd
    TUSBDF
    DBU
    UFTUUYU
    
    FYFDWF VTSCJODBU
    <DBU
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    Y ff FFF
    
    
    WBST
    
    
    
    CSL /6--
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
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    BSDI@QSDUM Y
    
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    BDDFTT FUDMETPQSFMPBE
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    fi MF
    PS
    EJSFDUPSZ
    PQFOBU "5@'%$8%
    FUDMETPDBDIF
    0@3%0/-:c0@$-0&9&$
    
    
    GTUBU 
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    ^
    
    
    NNBQ /6--
    
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    YGBFD
    ɾɾɾ
    SFBE 
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    XSJUF 
    IFMMPaO
    IFMMP
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    SFBE 
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    NVONBQ YGB
    
    
    
    
    
    
    
    
    
    
    
    
    DMPTF 
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
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    FYJU@HSPVQ 
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
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    XJUI
    
    ʢྫʣDBUϓϩάϥϜͷ࣮ߦ͢ΔγεςϜίʔϧΛTUSBDFͰදࣔ γεςϜίʔϧͷྫ
    ɹFYFDWF ɿϓϩάϥϜͷ࣮ߦ
    ɹPQFOBU ɿϑΝΠϧͷΦʔϓϯ
    ɹDMPTF ɿϑΝΠϧσΟεΫϦϓλʔͷΫϩʔζ
    ɹNNBQ ɿϝϞϦͷ֬อ
    ɹNVONBQ ɿϝϞϦͷղ์
    ɹSFBE ɿϑΝΠϧσΟεΫϦϓλʔ͔ΒͷಡΈࠐΈ
    ɹXSJUF ɿϑΝΠϧσΟεΫϦϓλʔ΁ͷॻ͖ࠐΈ 1SPDFTT 04 ,FSOFM 4:4$"-- 1SPDFTT 4:4$"--
14. 4FDDPNQʢ4&$VS
    $0.1VUJOHʣ
    ϓϩηε͕࣮ߦՄೳͳγεςϜίʔϧΛ੍ݶ͢Δ͜ͱͰɺϓϩηεͷෆਖ਼ૢ࡞΍ҙਤͤ͵ڍಈʹର͢ΔηΩϡϦςΟ֬อΛ
    ࣮ݱ͢Δػೳɻ
    
    γεςϜίʔϧͱ4FDDPNQ 1SPDFTT 04 ,FSOFM TFDDPNQ 4:4$"-- 1SPDFTT TFDDPNQ VCVOUVVTFS!VCVOUVTFSWFSd
    DBUTFDDPNQ
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    UFTUUYU
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    EFOZ
    FSS ʢྫʣϓϩάϥϜ͔ΒPQFOBU Λېࢭͨ͠ঢ়ଶͰDBUΛ࣮ߦ ɾɾɾ
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    BSDI@QSDUM Y
    
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15. DBUTFDDPNQD
    
    γεςϜίʔϧͱ4FDDPNQ JODMVEF
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    JODMVEF
    MJOVYBVEJUI
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    MJOVY fi MUFSI
    JODMVEF
    MJOVYTFDDPNQI
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    JGOEFG
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    JOU
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    VOTJHOFE
    JOU
    fl BHT
    WPJE
    BSHT
    \
    
    
    
    
    FSSOP
    
    
    
    
    
    
    SFUVSO
    TZTDBMM @@/3@TFDDPNQ
    PQ
    fl BHT
    BSHT 
    
    ^
    FOEJG
    
    #1'ͰTFDDPNQϧʔϧΛఆٛʢTZTDBMMͷڐՄېࢭΛఆٛʣ
    TUSVDU
    TPDL@ fi MUFS
    fi MUFS<>
    
    \
    
    
    
    
    #1'@45.5 #1'@-%
    c
    #1'@8
    c
    #1'@"#4
    P ff TFUPG TUSVDU
    TFDDPNQ@EBUB
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    #1'@+6.1 #1'@+.1
    c
    #1'@+&2
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    #1'@,
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    c
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    TFDDPNQ@EBUB
    OS
    
    
    
    
    #1'@+6.1 #1'@+.1
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    #1'@,
    @@/3@PQFOBU
    
    
    
    
    ϑΟϧλʔ͢ΔTZTDBMMʹPQFOBU  Λࢦఆ
    
    
    
    
    #1'@45.5 #1'@3&5
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    #1'@45.5 #1'@3&5
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16. 
    
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQ ,VCFSOFUFTͰ͸ίϯςφϓϩηεʹରͯ͠ڐՄېࢭ͢ΔγεςϜίʔϧΛ4FDDPNQϓϩϑΝΠϧͱͯ͠ఆٛͰ͖·͢ɻ
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    ίϯςφϓϩηεʹର͢ΔγεςϜίʔϧͷ੍ݶ͕ՄೳͰ͢ɻ
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17. 
    
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    %P4߈ܸ΍$POUBJOFS
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    ίϯςφ಺ͰVOTIBSFͱݺ͹ΕΔγεςϜίʔϧΛ࣮ߦ͢Δ͜ͱͰ͜ͷݖݶΛऔಘͰ͖ͯ͠·͏ɻ
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    S
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    S
    CJOCBTI
18. 
    
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQ $7&
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19. 
    
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQ 1PE΁ͷ4FDDPNQద༻ํ๏͸ҎԼͷύλʔϯͰ͢ɻ ᶃ$3*ϥϯλΠϜσϑΥϧτϓϩϑΝΠϧΛద༻
    ᶄಠࣗͷ4FDDPNQϓϩϑΝΠϧΛద༻ 3FTUSJDU
    B
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20. 
    
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQ
    ᶃ$3*ϥϯλΠϜσϑΥϧτϓϩϑΝΠϧΛద༻ $3*ϥϯλΠϜσϑΥϧτϓϩϑΝΠϧΛద༻
    ɹDPOUBJOFSE΍DSJP͸$3*ϥϯλΠϜͱͯ͠σϑΥϧτͷ4FDDPNQ
    QSP fi MFΛ͍࣋ͬͯ·͢ɻ
    ɹ͜ΕΛ1PEσϓϩΠ࣌ʹద༻͢Δ͜ͱͰɺίϯςφϓϩηε͔Β࣮ߦՄೳͳγεςϜίʔϧ੍͕ݶ͞ΕΔΑ͏ʹͳΓ·͢ɻ
    ɹಛผཁ͕݅ͳ͍ݶΓ͸ͪ͜ΒΛద༻͓ͯ͘͜͠ͱͰϥϯλΠϜͷఆٛ͢Δ࠷௿ݶͷηΩϡϦςΟ͸֬อͰ͖Δ͜ͱʹͳΓ·͢ɻ BQJ7FSTJPO
    W
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21. 
    
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQ
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    ɹݱࡏ,&1ʹͯ1PEσϓϩΠ࣌ʹσϑΥϧτͰ$3*ϥϯλΠϜσϑΥϧτͷ4FDDPNQϓϩϑΝΠϧΛద༻͢Δ͜ͱ͕
    ɹݕ౼͞Ε͍ͯ·͢ɻ
    ɹ˞,VCFSOFUFT
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22. 
    
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQ
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    ɹ$3*σϑΥϧτΑΓ΋ηΩϡϦςΟΛߴΊ͍ͨɺಠࣗͷϫʔΫϩʔυʹରԠ͍ͤͨ͞ͱ͍͏৔߹͸
    ɹڐՄېࢭ͢ΔγεςϜίʔϧΛهࡌͨ͠4FDDPNQϓϩϑΝΠϧΛίϯςφϗετʹ഑ஔ͠1PEσϓϩΠ࣌ʹద༻͢Δ͜ͱͰɺ
    ɹίϯςφϓϩηεʹಠࣗͷ4FDDPNQ͕ద༻͞Εҙਤͨ͠γεςϜίʔϧͷ࣮ߦͷΈ͕ڐՄ͞ΕΔΑ͏ʹͳΓ·͢ɻ BQJ7FSTJPO
    W
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23. 
    
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQ
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    ɹ,VCFSOFUFTʹ͓͍ͯಠࣗͷ4FDDPNQϓϩϑΝΠϧΛѻ͏ͷ͸ҎԼͷ؍఺͔Β݁ߏେมͰ͢ɻ
    ɹɹɾඞཁͳγεςϜίʔϧͷચ͍ग़͠
    ɹɹɾ4FDDPNQϓϩϑΝΠϧͷ࡞੒
    ɹɹɾ֤ίϯςφϗετ΁ͷ4FDDPNQϓϩϑΝΠϧ഑ஔ
    ɹͦ͜Ͱ4FDDPNQϓϩϑΝΠϧͷࣗಈੜ੒΍$3ԽʹΑΓ,VCFSOFUFT্Ͱͷ4FDDPNQͷѻ͍ΛϥΫʹͯ͘͠ΕΔ
    ɹTFDVSJUZQSP fi MFTPQFSBUPSͱ͍͏0QFSBUPS͕։ൃ͞Ε͍ͯ·͢ɻ
    ɹLVCFSOFUFTTJHTTFDVSJUZQSP fi MFTPQFSBUPS
    ɹIUUQTHJUIVCDPNLVCFSOFUFTTJHTTFDVSJUZQSP fi MFTPQFSBUPS
    ɹ4FDVSF
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    ɹ
    TFDVSJUZQSP fi MFTPQFSBUPSΛ͞ΘͬͯΈͨ
    ɹIUUQTTQFBLFSEFDLDPNPLFQZUSZTFDVSJUZQSP fi MFTPQFSBUPS
24. 
    
    ·ͱΊ ίϯςφʹ͓͚Δݖݶ੍ޚ
    ɹɾίϯςφͰ͸ϓϩηεִ཭ͷҰ؀ͱͯ͠ݖݶ੍ޚΛߦ͍ͬͯΔ
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    ɹɾ4FDDPNQͱ͸Χʔωϧʹର͢ΔγεςϜίʔϧΛ੍ݶ͢Δ࢓૊Έ
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQద༻ํ๏ͱҙٛ
    ɹɾ4FDDPNQͱ͔Α͘Θ͔ΒΜ͚ͲͱΓ͋͑ͣ͜Ε͘Β͍͸΍͓ͬͯ͜͏
    
25. 
    
    ·ͱΊ ίϯςφʹ͓͚Δݖݶ੍ޚ
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    ɹɾ4FDDPNQͱ͸Χʔωϧʹର͢ΔγεςϜίʔϧΛ੍ݶ͢Δ࢓૊Έ
    ,VCFSOFUFTʹ͓͚Δ4FDDPNQద༻ํ๏ͱҙٛ
    ɹɾ4FDDPNQͱ͔Α͘Θ͔ΒΜ͚ͲͱΓ͋͑ͣ͜Ε͘Β͍͸΍͓ͬͯ͜͏
    ɹɹˠಛʹཧ༝͕ͳ͚Ε͹3VOUJNF%FGBVMUΛద༻ͯ͠ෆཁͳγεςϜίʔϧ͕ൃߦ͞ΕΔηΩϡϦςΟϦεΫΛͳͦ͘͏
26. $POUBJOFS
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    #PPL
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    ࢀߟ
27. ຖि༵ۚdʹ,VCFSOFUFT$MPVE
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28. 5IBOL
    :PV