AVPlayerできちんとコンテンツ保護

iOSDC Japan 2021 day2, 20min Talk
https://fortee.jp/iosdc-japan-2021/proposal/889c9c50-fa76-4b54-a4f5-04ec99cc87ba

• AVPlayerについて
• HTTP Live Streamingの仕組み
• コンテンツ保護は何のため?
• AES-128による暗号化配信
• FairPlay Streaming
• マルチプラットフォームで動画ストリームを保護するには

Transcript

1. AVPlayerͰ͖ͪΜͱίϯςϯπอޢ
   ߦ໦ ઍय़ʢͳΊ͖ ͪ͸ΔʣTwitter, GitHub @Ridwy
   
   
   Streaming Client Team, גࣜձࣾ AbemaTV
   iOSDC JAPAN 2021, day2 (9/19)
   

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2. ܦྺ
   גࣜձࣾϐΫηϥ 2005 ~ 2015
   

   TVνϡʔφʔ, Χϝϥ, ը૾ॲཧ
   
   
   Mac, iPhoneͰ஍σδΛݟΔͨΊͷΞϓϦͳͲΛ୲౰
   
   
   גࣜձࣾαΠόʔΤʔδΣϯτ 2015 ~
   
   
   Amebaϒϩά iOSΤϯδχΞ
   
   
   AbemaTV Streaming Client Team
   

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3. • ৽͍͠ະདྷͷςϨϏʮABEMAʯ
   
   
   • ΠϯλʔωοτςϨϏہʢ2015೥։ہʣ
   
   
   • 20Ҏ্ͷνϟϯωϧ, VOD, ଞ
   

   ͞·͟·ͳࢹௌܗଶ
   
   
   • ੜதܧ΍൪૊੍࡞΋ख͕͚Δ
   גࣜձࣾAbemaTV
   

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4. Streaming Client Teamʹ͍ͭͯ
   • ABEMA͸ଟ͘ͷϓϥοτϑΥʔϜΛαϙʔτ
   

   iPhone, Apple TV, Android, Android TV, Web, IPTV, …
   

   • ֤ϓϥοτϑΥʔϜͷ࠶ੜΫϥΠΞϯτʹ஫ྗ͠ɺࢹௌମݧΛ୲อɾ޲্͢
   Δઐ໳νʔϜ
   
   
   • ϓϨΠϠʔͷ࣮૷, ࢹௌ඼࣭ͷ؂ࢹ, ৽ٕज़ͷPoC
   

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5. ΞδΣϯμ AVPlayerͰ͖ͪΜͱίϯςϯπอޢ
   • AVPlayerʹ͍ͭͯ
   
   
   • HTTP Live Streamingͷ࢓૊Έ
   
   
   • ίϯςϯπอޢ͸ԿͷͨΊʁ
   
   
   • AES-128ʹΑΔ҉߸Խ഑৴
   
   
   • FairPlay Streaming
   
   
   • ϚϧνϓϥοτϑΥʔϜͰಈըετϦʔϜΛอޢ͢Δʹ͸
   

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6. AVPlayer
   AppleͷϓϥοτϑΥʔϜͰө૾ɾԻ੠Λ࠶ੜ͢ΔϓϨΠϠʔ
   
   
   ϩʔΧϧͷϑΝΠϧ͚ͩͰͳ͘ɺϦϞʔτͷϑΝΠϧ΍ετϦʔϛϯά΋࠶ੜՄೳ
   • ϝσΟΞΛѻ͏AVFoundation.frameworkʹ࣮૷͞Ε͍ͯΔ
   
   
   • AVFoundation͸·ͣiOSͰ։ൃ͞Εɺ2011೥ʹMacʹҠ২
   
   
   • ಈըͳͲͷٕज़ͷਐาͱͱ΋ʹݱࡏ΋׆ൃʹ։ൃ͞Ε͍ͯΔ
   AVFoundation
   

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7. HTTP Live Streaming (HLS)
   AVPlayerͰ࠶ੜͰ͖ΔετϦʔϛϯάܗࣜ
   • Live, VODͷͲͪΒʹ΋ରԠ
   
   
   • HTTPΛར༻͢ΔͨΊεέʔϥϏϦςΟʹ༏ΕΔ
   
   
   • Adaptive Bit Rate (ABR)
   

   ճઢঢ়گʹΑΓ࠷దͳϏοτϨʔτͷετϦʔϜʹεΠονՄೳ
   
   
   • ࢓૊Έ্ɺ2, 3ඵҎԼͷ௿஗Ԇ഑৴͸࣮ݱग़དྷͳ͔͕ͬͨɺ
   

   Low Latency HLSͷొ৔ʹΑΓෆՄೳͰ͸ͳ͘ͳͬͨ
   AppleʹΑͬͯ։ൃ͞ΕɺRFC8216ͱͯ͠ެ։
   
   
   Android΍ϒϥ΢βͰ΋࠶ੜՄೳ
   ಛ௃
   

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8. HTTP Live Streaming
   M3U8
   
   
   ϓϨΠϦετ
   ϝσΟΞηάϝϯτ
   

   TS or fMP4
   ϓϨΠϠʔ͸ϓϨΠϦετͷதʹهࡌ͞Ε͍ͯΔηάϝϯτΛ্͔Β࿈ଓͯ͠࠶ੜ
   ରԠCODEC:
   

   HEVC or H.264,
   

   AAC or AC-3
   

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9. M3U8ϓϨΠϦετͷྫ
   #EXTM3U
   
   
   #EXT-X-TARGETDURATION:10
   
   
   #EXTINF:9.009,
   
   
   http://media.example.com/first.ts
   
   
   #EXTINF:9.009,
   
   
   http://media.example.com/second.ts
   
   
   #EXTINF:3.003,
   
   
   http://media.example.com/third.ts
   

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10. Adaptive Bit Rate (ABR)
    ϚελʔϓϨΠϦετ = ଳҬ͝ͱͷϝσΟΞϓϨΠϦετΛෳ਺ؚΉϓϨΠϦετ
    #EXTM3U
    
    
    #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=200000
    
    
    gear1/prog_index.m3u8
    
    
    #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=311111
    
    
    gear2/prog_index.m3u8
    
    
    #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=484444
    
    
    gear3/prog_index.m3u8
    ετϦʔϜͷ࠷େϏοτϨʔτ (bps)
    

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11. Adaptive Bit Rate (ABR)
    ϓϨΠϠʔ͸ճઢঢ়گʹԠͯ͡࠷దͳετϦʔϜʹεΠον͠ͳ͕Β
    

    ׈Β͔ͳ࠶ੜΛଓ͚Δ
    ి೾͕ѱ͘ͳͬͯདྷͨͧʁ
    

    ௿ը࣭ʹ੾Γସ͑ͯ͠ͷ͝͏
    ͓ɺվળͯ͠དྷͨ
    ߴը࣭ʹ໭ͬͨʂ😃
    Low
    High
    

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12. ίϯςϯπอޢ͸ԿͷͨΊʁ
    

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13. ίϯςϯπอޢͷඞཁੑ
    Ξφϩάഔମͷίϯςϯπ͸ίϐʔ͢Δͱ඼࣭͕ྼԽ͢Δ
    
    
    • ίϐʔͷՁ஋͕௿͍ͷͰஶ࡞ݖ؅ཧͷඞཁੑ͸ߴ͘ͳ͔ͬͨ
    
    
    σδλϧίϯςϯπ͸׬શͳίϐʔ͕Մೳ
    
    
    • ւ଑൛ͷൢച, ࡞඼ͷվม, …
    
    
    • ੍࡞ऀɾݖརऀ͕๬·ͳ͍ܗͰফඅ͞ΕΔͷΛ๷͙࢓૊Έ͕ඞཁ
    

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14. ΋͠ɺಈը഑৴ͰԿ΋͠ͳ͔ͬͨΒʁ
    URLΛ஌͍ͬͯΕ͹ಈըΛݟΒΕΔͷͰ
    

    ʮ࡞඼Λߪೖͯ͠΋Β͏ʯͱ͍͏ϏδωεϞσϧ͕੒ཱ͠ͳ͍
    
    
    ͓ۚͷ໰୊͚ͩͰ͸ͳ͘…
    
    
    • ഑৴ଆʮձһݶఆίϯςϯπΛ഑৴͠Α͏ʂʯˠ ୭Ͱ΋ݟΒΕΔΑʁ
    
    
    • ग़ԋऀʮxxͷ൪૊ʹग़ԋ͠·ͨ͠ʂʯˠ ࣮࣭ɺશੈքͰϑϦʔૉࡐԽ
    ͋·Γָ͘͠ͳ͍ੈք
    

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15. ༷ʑͳίϯςϯπอޢͷख๏
    ΞΫηεํ๏Λ੍ݶ
    
    
    IP੍ݶ, υϝΠϯ੍ݶ, ॺ໊෇͖URL, ...
    
    
    ίϯςϯπΛ҉߸Խ
    
    
    ɹ҉߸Խ഑৴, DRM഑৴, ...
    

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16. DRM
    σδλϧίϯςϯπͷஶ࡞ݖ؅ཧٕज़
    Digital Rights Management
    ίϯςϯπΛ҉߸Խͯ͠कΔ
    
    
    อޢ͞Εͨܦ࿏ͰͷΈө૾΍Ի੠Λ࠶ੜ
    ࡞඼͕Ͳ͏࢖ΘΕΔ΂͖͔Λنఆ͠؅ཧ͢Δ
    

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17. DRMͷ໰୊఺
    ಛఆͷαʔϏε΍؀ڥʹґଘ
    
    
    • DRMίϯςϯπΛར༻Ͱ͖Δͷ͸ɺͦͷίϯςϯπΛߪೖͨ͠αʔϏεͷΈ
    Ͱ͋Δ͜ͱ͕ଟ͍
    
    
    • ߪೖͨ͠ίϯςϯπΛӬԕʹར༻Ͱ͖Δอূ͸ͳ͍
    

    ిࢠॻ੶ͷετΞ͕Ϋϩʔζͨ͠Βʁ େྔͷίϯςϯπΛߪೖͨ͠ΞΧ΢ϯτ͸૬ଓͰ͖Δʁ
    

    ར༻ํ๏Λنఆ͢Δ΋ͷͳͷͰɺ࢖͍ʹ͘͞ʹܨ͕Γ΍͍͢
    
    
    • Ωπ͗͢Ε͹੍ݶʹͳΓɺͻͲ͍৔߹͸ফඅऀͷݖརͷ৵֐ʹͳΔɻ
    

    ࡞඼Λ࠷େݶʹָ͠ΊΔઃܭͰ͋Δ͜ͱ͕େ੾
    

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18. ࡞඼Λ࠷େݶʹָ͠ΊΔઃܭ͕େ੾
    

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19. ҉߸Խͷجૅ஌ࣝ
    ڞ௨伴҉߸
    ಉ͡伴Ͱ҉߸Խɾ෮߸Խ
    Data
    🔐
    

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20. ϒϩοΫ҉߸
    େ͖ͳσʔλΛ҉߸Խ͢ΔࡍɺϒϩοΫʹ෼͚ͯ҉߸Խ
    Block
    🔒
    ҉߸Խͷجૅ஌ࣝ
    Block
    🔒
    Block
    🔒
    Block
    🔒
    Block
    🔒
    🔑
    

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21. ҉߸Խͷجૅ஌ࣝ
    AES (Advanced Encryption Standard)
    • ୅දతͳڞ௨伴ϒϩοΫ҉߸
    
    
    • ϒϩοΫ௕ 128bit
    
    
    • ԿϏοτͷ伴Λ༻͍Δ͔ʹΑͬͯ AES-128, AES-192, AES-256ͱදه͞ΕΔ
    

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22. Block
    Block
    🔑
    🔒
    ҉߸Խͷجૅ஌ࣝ
    ϒϩοΫ҉߸ͷ҉߸ར༻Ϟʔυ
    CBC (Cipher Block Chaining) Ϟʔυ
    ෮߸Խʹ͸ॳظϕΫτϧ(IV)ͱ伴͕ඞཁ
    IV
    Block
    Block
    🔑
    🔒
    Block
    Block
    🔑
    🔒
    ॳظϕΫτϧ
    XOR XOR XOR
    

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23. ҉߸Խͷجૅ஌ࣝ
    ϒϩοΫ҉߸ͷ҉߸ར༻Ϟʔυ
    CTR (Counter) Ϟʔυ
    CTR Block
    Block
    🔑
    🔒
    XOR
    CTR
    🔒
    CTR+1 Block
    Block
    🔑
    🔒
    XOR
    CTR+1
    🔒
    CTR+2 Block
    Block
    🔑
    🔒
    XOR
    CTR+2
    🔒
    ҉߸Խɾ෮߸Խͱ΋ʹฒྻԽ͕Մೳ
    

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24. ҉߸Խͷجૅ஌ࣝ
    ެ։伴҉߸
    • ڞ௨伴҉߸͸伴Λ͍͔ʹ҆શʹ૬खʹ౉͔͕͢՝୊
    

    → ͦΕͳΒ҉߸Խͱ෮߸Խͷ伴Λผʹ͢Ε͹͍͍͡Όͳ͍
    

    ҉߸ԽͰ͖Δ͚ͩͷ伴͕όϨͯ΋໰୊ͳ͍͠ɺͳΜͳΒެ։ͯ͠΋🙆
    

    • ڞ௨伴҉߸ͱൺ΂ͯॲཧ͕ॏ͍ͷͰେ༰ྔσʔλʹ͸޲͔ͳ͍
    

    → େ༰ྔσʔλΛڞ௨伴҉߸Ͱ҉߸Խͯ͠ɺ伴Λެ։伴҉߸Ͱ౉͢
    

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25. ҉߸Խͨ͠ετϦʔϜΛHLSͰ഑৴͢Δ
    

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26. AES-128ʹΑΔ҉߸Խ഑৴
    ηάϝϯτશମΛAES-128 CBCϞʔυͰ҉߸Խ
    Segment
    🔒 Segment
    🔒 Segment
    🔒 Segment
    🔒
    #EXT-X-KEY:METHOD=AES-128,URI="伴Λऔಘ͢ΔͨΊͷ
    URI",IV=0x012345678901234567890123456789012
    

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27. • URIʹ伴ͷ৔ॴͦͷ΋ͷΛॻ͘ͱɺๅശʹʮ伴͸ςʔϒϧͷ্ʯͱுΓࢴΛͯ͠
    ͍ΔΑ͏ͳ΋ͷ
    

    

    伴ͷ౉͠ํʹ޻෉͕ඞཁ
    
    
    • 伴ͷαʔόʹೝূػೳΛ͚ͭΔ
    
    
    • ΧελϜεΩʔϚΛར༻ͯ͠ΞϓϦଆͰಠࣗॲཧΛߦ͏
    
    
    • etc.
    
    
    • εΫϦʔϯγϣοτ΍ը໘࿥ըɺϛϥʔϦϯά͸Մೳ
    

    ʢඞཁͳΒΞϓϦͷίʔυͰରࡦʣ
    AES-128ʹΑΔ҉߸Խ഑৴
    

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28. AVContentKeySession
    ΞϓϦଆͰ伴Λऔಘ
    • ίϯςϯπͷ伴Λऔಘ͢ΔͨΊʹઃܭ͞ΕͨAPI
    
    
    • ࠶ੜը໘ʹདྷͨΒɺ͋Β͔͡ΊΩʔΛऔಘ͓ͯ͘͜͠ͱ΋Մೳ
    

    → Join Timeͷվળʹ໾ཱͭ
    
    
    • METHOD=AES-128Ͱ΋ɺγϛϡϨʔλͰ͸ಈ͔ͳ͍ʁ
    

    ͜ͷΫϥεొ৔લ͔Β͋ΔAVAssetResourceLoader͸ಈ͘
    

    URLProtocolͰ΋ϑοΫՄೳ
    WWDC18 Session 507 AVContentKeySession Best Practices
    ࢀߟ:
    

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29. session = AVContentKeySession(keySystem: .clearKey)
    
    
    session.setDelegate(self, queue: .global())
    
    
    let asset = AVURLAsset(url: playlistURL)
    
    
    session.addContentKeyRecipient(asset)
    
    
    player = AVPlayer(playerItem: AVPlayerItem(asset: asset))
    extension Foo: AVContentKeySessionDelegate {
    
    
    func contentKeySession(_ session: AVContentKeySession,
    
    
    didProvide keyRequest: AVContentKeyRequest) {
    
    
    getKey(from: keyRequest.identifier) { key in
    
    
    if let key = key {
    
    
    let response = AVContentKeyResponse(clearKeyData: key, initializationVector: nil)
    
    
    keyRequest.processContentKeyResponse(response)
    
    
    } else {
    
    
    keyRequest.processContentKeyResponseError(KeyError.unknown)
    
    
    }
    
    
    }
    
    
    }
    
    
    }
    
    
    AVContentKeySessionͰMETHOD=AES-128ͷ伴Λऔಘ͢Δྫ
    

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30. FairPlay StreamingʹΑΔDRM഑৴
    伴ͷ഑৴ํ๏ΛఆΊͯɺ΋ͬͱݎ࿚ʹ͠Α͏
    

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31. FairPlay Streaming (FPS)
    • AppleʹΑͬͯ։ൃ͞ΕͨಈըετϦʔϜΛอޢ͢ΔͨΊͷDRMٕज़
    
    
    • AppleͷσόΠεʢ+ AirPlayରԠεϚʔτTVʣͰར༻Մೳ
    
    
    • ωΠςΟϒΞϓϦ & Safari
    
    
    • ηΩϡΞͳ伴ͷ഑৴
    
    
    • HDCPͳͲʹରԠ͠ɺอޢ͞Εͨܦ࿏ͰͷΈө૾ɾԻ੠Λ࠶ੜ
    

    εΫγϣΛࡱΔͱө૾ྖҬ͕ਅͬࠇʹͳΔ
    
    
    • ΦϑϥΠϯ࠶ੜ΍ϨϯλϧͷͨΊͷ࢓૊Έ͕͋Δ
    

    ϏδωεϩδοΫࣗମ͸نఆ͠ͳ͍
    
    
    • ແྉ
    

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32. FairPlayͱུ͕ͪ͠Ͱ͕͢ผ෺Ͱ͢…💦
    FairPlay = iTunes StoreͷΞΠςϜʹ࢖ΘΕ͍ͯΔDRMٕज़
    

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33. FPSͰͷίϯςϯπͷ҉߸Խํࣜ
    • ίϯςφ಺ͷϏσΦΛϑϨʔϜຖɺΦʔσΟΦ͸αϯϓϧຖʹ
    

    AES-128 CBCϞʔυͰ҉߸Խ
    
    
    • ϏσΦ͸શମͷ10%Λ҉߸Խ (encrypt:skip pattern of 1:9)
    

    ϏσΦΛσίʔυͰ͖ͳ͘͢Δʹ͸ɺ෦෼తʹ҉߸Խ͢Ε͹े෼
    #EXT-X-KEY:METHOD=SAMPLE-AES,URI="skd://key65",
    
    
    KEYFORMAT="com.apple.streamingkeydelivery",KEYFORMATVERSIONS="1"
    

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34. ίϯςϯπͷ伴Λऔಘ͢ΔྲྀΕ
    Apple device
    OS App
    Key server
    Key Security Module
    Load Key
    Get SPC
    [CKC 🔑 ]
    [SPC]
    [SPC]
    [CKC 🔑 ]
    ࣮૷Օॴ
    ͪ͜ΒͰ४උ
    Apple Provided
    Key Security Module (KSM) ͸
    

    ҉߸Խ͞ΕͨServer Playback ContextΛड͚औͬͯ
    

    ίϯςϯπͷ伴ΛؚΉContent Key ContextΛ
    

    ੜ੒ɾ҉߸Խͯ͠ฦ͢
    

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35. ίϯςϯπͷ伴Λऔಘ͢ΔྲྀΕ
    Apple device
    OS App
    Key server
    Key Security Module
    Load Key
    Get SPC
    [CKC 🔑 ]
    [SPC]
    [SPC]
    [CKC 🔑 ]
    ࣮૷Օॴ
    ͪ͜ΒͰ४උ
    Apple Provided
    • 伴Λ஌͍ͬͯΔͷ͸Key Serverͱ
    OSͷΈʢΞϓϦ΋஌Βͳ͍ʂʣ
    
    
    • ίϯςϯπ͸OSͷΧʔωϧͰ෮߸
    

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36. FairPlay Streaming ૊ΈࠐΈखॱ
    1. Key Security ModuleΛ࣮૷
    

    ެࣜϖʔδ͔Βμ΢ϯϩʔυͰ͖ΔSDKΛར༻͠ɺ·ͣ͸։ൃ༻ͷূ໌ॻͰ࣮૷
    جຊతʹެࣜͷϖʔδΛݟͯ࡞ۀΛਐΊΔ
    https://developer.apple.com/streaming/fps/
    FairPlay Streaming Server SDK
    • Programming Guide
    
    
    • KSMͷϦϑΝϨϯε࣮૷
    
    
    • ςετϕΫλʔʢ࣮૷͕ਖ਼͍͔֬͠ೝ͢ΔͨΊͷςετ༻σʔλʣ
    
    
    • ΞϓϦɾSafariͷαϯϓϧίʔυ
    

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37. 2. https://developer.apple.com/contact/fps/͔Β
    

    FairPlay Streaming Deployment package
    

    ΛϦΫΤετ
    FairPlay Streaming ૊ΈࠐΈखॱ
    ਖ਼͍͠໨తͰར༻͠Α͏ͱ͍ͯ͠Δ͔νΣοΫ͞ΕΔ
    
    
    Appleͷ୲౰ऀͱগ͠΍ΓͱΓ͢Δ͜ͱ΋
    

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38. 3. ແࣄঝೝ͞ΕͨΒDeployment packageͷ಺༰ʹैͬͯҎԼΛੜ੒
    
    
    • FairPlay Streaming ূ໌ॻʢΞϓϦέʔγϣϯূ໌ॻʣ
    

    developerͷࣝผʹར༻
    
    
    • ূ໌ॻʹඥͮ͘private key
    
    
    • Application Secret key (ASk)
    
    
    4. Key Security Moduleͷ࣮૷Λੜ੒ͨ͠ূ໌ॻͳͲͰΞοϓσʔτ
    
    
    5. อޢίϯςϯπ४උ
    
    
    6. ΞϓϦ࣮૷
    

    SDKʹؚ·ΕΔαϯϓϧίʔυHLSCatalog͕ඇৗʹࢀߟʹͳΔ
    FairPlay Streaming ૊ΈࠐΈखॱ
    

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39. SafariͰ΋ಉ༷ͷྲྀΕͰ伴ΛऔಘՄೳ
    Apple device
    EME JS
    Key server
    Key Security Module
    1. Load Key
    2. Get SPC
    6. [CKC 🔑 ]
    3. [SPC]
    4. [SPC]
    5. [CKC 🔑 ]
    ࣮૷Օॴ
    ͪ͜ΒͰ४උ
    Apple Provided
    1. 'webkitneedkey' event
    
    
    2. Create keySession
    
    
    3. 'webkitkeymessage' evnt
    with [SPC]
    6. Update keySession with [CKC]
    

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40. FairPlay Streaming over AirPlay
    อޢ͞ΕͨίϯςϯπΛApple TV΍εϚʔτTVͰʂ
    Apple device
    OS App
    Key server
    Key Security Module
    Apple TVͳͲ
    OS
    Player Streamer
    CDN
    ίϯςϯπ ΞϓϦ͸ [SPC], [CKC] ΛϦϨʔ
    
    
    ௥Ճͷ࣮૷͸ෆཁ
    

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41. ϚϧνϓϥοτϑΥʔϜͰ
    

    ಈըετϦʔϜΛอޢ͢Δʹ͸
    

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42. ͞·͟·ͳDRMγεςϜ
    DRMγεςϜ ఏڙ ରԠϓϥοτϑΥʔϜ
    PlayReady Microsoft Windows, Android, iOS
    Widevine Google Android
    FairPlay Streaming Apple AppleσόΠε
    

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43. Common Encryption (CENC) ͱDRM
    ίϯςϯπͷڞ௨҉߸ԽϑΥʔϚοτ
    DRMγεςϜ CTR CBC
    PlayReady
    ✔︎
    ✔︎
    Widevine
    ✔︎
    ✔︎
    FairPlay Streaming ❌
    ✔︎
    4.0Ҏ߱
    

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44. ετϦʔϛϯάܗࣜͱ҉߸ར༻Ϟʔυ
    ετϦʔϛϯάܗࣜ CTR CBC
    HLS ❌
    ✔︎
    MPEG-DASH
    ✔︎
    ❌
    MPEG-DASH (CMAF)
    ✔︎
    ✔︎
    CENCΛར༻ͯ͠ڞ௨ͷ҉߸ԽίϯςϯπΛར༻Ͱ͖Δͱخ͍͠
    

    ετϦʔϜͷCMAFରԠɺfMP4ԽͳͲ͕ඞཁ
    

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45. AVPlayerͰ͖ͪΜͱίϯςϯπอޢ
    • AVPlayerʹ͍ͭͯ
    
    
    • HTTP Live Streamingͷ࢓૊Έ
    
    
    • ίϯςϯπอޢ͸ԿͷͨΊʁ
    
    
    • AES-128ʹΑΔ҉߸Խ഑৴
    
    
    • FairPlay Streaming
    
    
    • ϚϧνϓϥοτϑΥʔϜͰಈըετϦʔϜΛอޢ͢Δʹ͸
    Recap
    

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46. ࢀߟࢿྉ
    WWDC Sessions
    
    
    WWDC18 Session 507 AVContentKeySession Best Practices
    
    
    WWDC15 Session 502 Content Protection for HTTP Live Streaming
    
    
    Apple։ൃऀ޲͚ϖʔδ
    
    
    HTTP Live Streaming
    

    https://developer.apple.com/streaming/
    
    
    FairPlay Streaming
    

    https://developer.apple.com/streaming/fps/
    

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47. ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    
    
    🙇
    

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