Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Email, Messaging, and SSI/DID (再放送)
Search
sylph01
November 19, 2020
Technology
0
1.4k
Email, Messaging, and SSI/DID (再放送)
@ #idcon vol.28
https://idcon.connpass.com/event/191305/
sylph01
November 19, 2020
Tweet
Share
More Decks by sylph01
See All by sylph01
The Definitive? Guide To Locally Organizing RubyKaigi
sylph01
6
1.5k
End-to-End Encryption Saves Lives. You Can Start Saving Lives With Ruby, Too
sylph01
1
99
End-to-End Encryption Saves Lives. You Can Start Saving Lives With Ruby, Too (JP subtitles)
sylph01
2
460
Introduction to C Extensions
sylph01
3
200
"Actual" Security in Microcontroller Ruby!?
sylph01
0
140
Everyone Now Understands AuthZ/AuthN and Encryption Perfectly and I'm Gonna Lose My Job
sylph01
1
61
Updates on PicoRuby Networking, HPKE (and maybe more)
sylph01
1
300
Adding Security to Microcontroller Ruby
sylph01
3
3.6k
Secure Messaging at IETF 118
sylph01
0
110
Other Decks in Technology
See All in Technology
生成AIで小説を書くためにプロンプトの制約や原則について学ぶ / prompt-engineering-for-ai-fiction
nwiizo
4
2.2k
M3 Expressiveの思想に迫る
chnotchy
0
110
低レイヤを知りたいPHPerのためのCコンパイラ作成入門 完全版 / Building a C Compiler for PHPers Who Want to Dive into Low-Level Programming - Expanded
tomzoh
4
3.3k
Windows 11 で AWS Documentation MCP Server 接続実践/practical-aws-documentation-mcp-server-connection-on-windows-11
emiki
0
990
フィンテック養成勉強会#54
finengine
0
180
2025-06-26_Lightning_Talk_for_Lightning_Talks
_hashimo2
2
100
登壇ネタの見つけ方 / How to find talk topics
pinkumohikan
5
520
Yamla: Rustでつくるリアルタイム性を追求した機械学習基盤 / Yamla: A Rust-Based Machine Learning Platform Pursuing Real-Time Capabilities
lycorptech_jp
PRO
3
120
Amazon Bedrockで実現する 新たな学習体験
kzkmaeda
2
580
Lambda Web Adapterについて自分なりに理解してみた
smt7174
3
120
Oracle Audit Vault and Database Firewall 20 概要
oracle4engineer
PRO
3
1.7k
AIエージェント最前線! Amazon Bedrock、Amazon Q、そしてMCPを使いこなそう
minorun365
PRO
15
5.3k
Featured
See All Featured
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Facilitating Awesome Meetings
lara
54
6.4k
A Modern Web Designer's Workflow
chriscoyier
694
190k
The Language of Interfaces
destraynor
158
25k
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
8
670
Docker and Python
trallard
44
3.4k
Fantastic passwords and where to find them - at NoRuKo
philnash
51
3.3k
Making Projects Easy
brettharned
116
6.3k
Code Review Best Practice
trishagee
68
18k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
138
34k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
48
2.8k
Producing Creativity
orderedlist
PRO
346
40k
Transcript
Email, Messaging, and SSI/DID Ryo Kajiwara / sylph01 @ #idcon,
2020/11/19, ຊޠ࠶์ૹ
ҙࣄ߲ • ͜ΕͲͪΒ͔ͱ͍͏ͱҙݟද໌ͷΑ͏ͳੑ࣭ͷൃදͰ͢ • Ұ࣌ظͷQiitaͰ͍͏ͱ͜ΖͷʮϙΤϜʯ • ٞͷͨΊͷΞΠσΞग़͠Λ͢Δੑ࣭ͷͷͰ͢ • ΑͬͯɺϓϩμΫτ։ൃՌͷσϞͰ͋Γ·ͤΜ •
·ͨɺٞલఏʹൈ͚݀༨༟Ͱଘࡏ͢ΔͣͰ͢
None
TL;DR
SMTPΛ ΊΖ
Ͳ͏ͬͯ ΊΔʁ
None
ϝοηʔδϯάʹٻΊΔੑ࣭ • End-to-End҉߸Խ • ࠷֤ۙࠃ͕ban͠Α͏ͱ͍ͯ͠Δͬͯʁ • ҉߸Խ͞Εͨάϧʔϓϝοηʔδϯά • σʔλͷ੍ޚ •
identityදݱͷ੍ޚ
Q: ͳΜͰLINE / Facebook Messenger / WhatsApp etc.͕͋Δͷ ʹϝʔϧͳΜ͔ͬͯ Δͷʁ
Q: ͳΜͰLINE / Facebook Messenger / WhatsApp etc.͕͋Δͷ ʹϝʔϧͳΜ͔ͬͯΔͷʁ •
SMTPेͳ҉߸ԽೝূΛ͍࣋ͬͯͳ͍ • Eϝʔϧ௨ৗEnd-to-End҉߸ԽΛ͍࣋ͬͯͳ͍ • PGPS/MIMEΛͬͨͱ͜ΖͰάϧʔϓʹର͢Δ҉߸Խί ϛϡχέʔγϣϯͰ͖ͳ͍ • Eϝʔϧʹspam͕͋Δ
Q: ͳΜͰLINE / Facebook Messenger / WhatsApp etc.͕͋Δͷ ʹϝʔϧͳΜ͔ͬͯΔͷʁ A:
ࣄલͷ৴པؔͷͳ͍ਓ͔Β ϝοηʔδΛड͚औΔ͜ͱ͕Ͱ͖Δ
Eϝʔϧʹspam͋Δ ͡ΌΜʂ
Eϝʔϧʹspam͕͋Δ ͷϓϩτίϧʹΈ ࠐ·Εͨಗ໊ੑ͕ݪҼ
Eϝʔϧͷಗ໊ੑ ʮࣄલͷ৴པؔͷͳ͍ਓ͔ΒϝοηʔδΛड͚औΕΔʯͱ͍͏ ੑ࣭ిʹ͋ͯ·Δ͕ɺEϝʔϧʹిʹ͋ΔΑ͏ͳ anti-abuse mechanismΛ͍࣋ͬͯͳ͍ɻ͜ΕEϝʔϧͷಗ໊ੑʹ ΑΔͷͰ͋Δɻ • ిΛabuseͨ͠߹ٯ୳͕Մೳ • Eϝʔϧʹ͓͍ͯidentityͷspoofing͕༰қͰɺั·͑Δ͜ͱ͕
ࠔ • ͱ͍͏͔Eϝʔϧʹ·ͱͳidentity layer͕ͳ͍
spammerEϝʔϧͷ ಗ໊ੑΛͬͯѱࣄΛ ಇ͘
ͦͦಗ໊ͷEϝʔϧɺཉ ͍͠ʁ ಗ໊ͷEϝʔϧߴ֬Ͱspamɻ ৽ͨʹ৴པؔ݁ͼ͍ͨ߹ಗ໊Ͱ͋Δ͜ͱʹ͍͍͜ͱͦΜͳ ʹͳ͍ɻ
͡Ό͋S/MIMEΛશҬత ʹ͍͍͑ͷͰʁ
S/MIMEͷ • ߴ͍ • ൃߦ͞Εͨ༻్ʹറΒΕΔ • ͋Δূ໌ॻಛఆͷorganizationʹ͓͚ΔॴଐΛূ໌ͯ͘͠Ε Δ͔͠Εͳ͍͕ • ΠϯλʔωοτͰৗʹͦͷಛఆͷࢠΛͣͬͱ͔Ϳ͍ͬͯͨ
͍͔ͱ͍͏ͱͦ͏Ͱͳ͍ • ෳͷূ໌ॻ͍͍͑͡ΌΜʁ1ߦʹΔ
ͬͱυϥεςΟοΫͳղ๏: ϚΠφϯόʔΧʔυͷ ূ໌ॻͰsign͞Εͨ ϝʔϧͳΒࣗಈతʹड ͚ೖΕΔ
୭ϚΠφϯόʔʹඥ ͍ͨΞΧϯτͰ spamͳΜ͔͠ͳ͍Ͱ ͠ΐʁ
·͋Θ͟Θ͟SSI/DIDͷ ฉ͖ʹདྷΔํͳΒ͜ ΕͷԿ͕ා͍͔Θ͔ Δͱࢥ͍·͕͢
None
Eϝʔϧͷself-sovereignੑ SMTP/POP/IMAPͱͱself-sovereignੑΛຬͨ͢ϓϩτίϧͰ ͋ͬͨɻࣗͰαʔόʔཱͯΔݶΓɻ • ࣗͰIDΛൃߦͰ͖Δ • ༻్ʹԠͯ͡IDΛ͍͚Δ͜ͱ͕Ͱ͖Δ • ࣗͷσʔλͷίϯτϩʔϧࣗͰ࣋ͭ͜ͱ͕Ͱ͖Δ
Eϝʔϧͷself-sovereignੑ ࠷ۙ୭ͦΜͳ͜ͱ͠ͳ͍ɻ • SMTP: దʹೝূ͢Δͷ͕͍͠ɻઃఆ1ݸͰؒҧ͑Δͱ spamͷ౿Έɻ • IMAP: ϚϧνσόΠεΞΫηεͳΒඞਢɻ͚ͩͲετϨʔδཧ ࠈʹؕΔ
݁Ռɺຊདྷself-sovereignͰ͋Δͣͷϓϩτίϧͳͷ͕ͩɺதԝ ूݖԽΛڐͯ͠͠·ͬͨ
Eϝʔϧͷself-sovereignੑ EϝʔϧͷதԝूݖԽspamͷΛΑΓѱԽ͍ͤͯ͞Δɻதԝ ूݖతEϝʔϧϓϩόΠμͷspamϑΟϧλͷಈ࡞ʹेͳಁ໌ੑ͕ ͳ͘ɺѱҙͷͳ͍ϝʔϧͰ͢ΒspamϑΟϧλʹҿ·ΕΔɻதԝू ݖతEϝʔϧϓϩόΠμΛར༻͍ͯ͠ͳ͍ϝʔϧspamϑΟϧλΛ ৴༻ͤ͞Δ͜ͱ͕͘͠ͳΓɺΑΓதԝूݖԽ͕ਐΉ ʢಁ໌ੑ͕͋ͬͨΒ͋ͬͨͰspamۀऀ͕ͦΕΛᷖճͯ͘͠ΔͷͰ Ϛζ͍ͱ͍͑ͦͷͱ͓Γ͕ͩ…ʣ
"Principles of User Sovereignty / Fundamental Problems of Distributed Systems"
@ IIW30 ʮࢄγεςϜͷ๊͑ΔࠜຊతͳΛղܾͰ͖ͳ͍ͱ͖ɺͦΕ اۀʹΑΔதԝूݖԽ(corporate capture)ΛࣗΒڐͯ͠͠·͏ʯ Eϝʔϧ·͞ʹ͜ͷ࠷ͨΔྫͰ͋ΔɻࢄγεςϜ๊͕͑Δຊ࣭ తͳʹରͯ͠ेͳղܾ͕ͳ͞Εͳ͔ͬͨͨΊɺاۀͦ͜ ʹϚωλΠζͷػձΛݟग़͠ɺதԝूݖԽͯ͠͠·ͬͨɻ
"Fundamental Problems of Distributed Systems" ྫ: • ϊʔυͷσΟεΧόϦʔ(Eϝʔϧͷ߹ૹ৴ઌͷ֬ఆʹඞཁ) • ϊʔυ͕ωοτϫʔΫʹࢀՃ͢Δࡍͷηογϣϯͷཱ֬
(introduction) • ϓϥΠόγʔ(ظతͳؔ࿈͚ͷࢠ) • τϥετ
Eϝʔϧ͕digital identityͷ֩ͱͳΔ ͜ͱͷා͍ ύεϫʔυΕͨͱ͖ͷϦηοτ͍͍ͩͨEϝʔϧΛ௨ͯ͠ߦΘ Ε·͢Ͷʁ →Eϝʔϧ͕ͬऔΒΕΔͱ͋ͳͨͷΠϯλʔωοτ্ͷidentity શͯͬऔΕ·͢ɻ secure messaging͕ସͰ͖Δ͔Ͳ͏͔͓͖ͯ͞ɺेʹηΩϡ ΞͰͳ͍ϓϩτίϧ/ΤίγεςϜΛdigital
identityͷ֩ͱ͢Δͷ ةݥͰ͋ΓɺସΛߟ͑Δඞཁ͕͋Δɻ
None
Ͳ͏ͨ͠ΒղܾͰ͖ Δʁ
༧ઢ: ͜Εͬͯཁ͢ΔʹBetter PGPͷͩΑͶʁ →ͬͯΔɻ
Verifiable CredentialΛ༻͍ͨEϝʔϧ ֤τϥϯβΫγϣϯʢ͜͜ͰEϝʔϧͷΓͱΓʹ૬͢Δʣ͝ ͱʹҟͳΔidentityͷදݱΛΓग़ͯ͠͏ʹͲ͏͢ΕΑ͍ ͔ʁˠಛఆͷidentityͷදݱʹରԠ͢Δverifiable credentialΛ͑ Α͍ spamϑΟϧλEϝʔϧʹؔ࿈͍ͮͨVCͷਖ਼ੑɾ৴པΛఆ ͢Δ
Verifiable CredentialΛ༻͍ͨEϝʔϧ Կ͕خ͍͠ʁ • ૹ৴ऀ: ʢϝʔϧ͕ਖ਼ͳ༻్Ͱ͋ΔݶΓʣspamϑΟϧλʹ ͻ͔͔ͬΔ͜ͱ͕ݮΔ • ͍ͭͰʹɺৗʹެࣜͳࢠ͔Ϳͬͯͳͯ͘Α͍ •
ड৴ऀ: spam͕ݮΔɺ·ͱͳϝʔϧ͕ड৴ശʹೖͬͯ͘Δ • ͪΌΜͱͨ͠ϓϩτίϧ֦ுΛ͢ΕݱࡏͷSMTPͷΤίγες ϜͱڞଘͰ͖Δ
Messaging Layer Security https://messaginglayersecurity.rocks/ ηΩϡΞͰinteroperableͳάϧʔϓϝοηʔδϯάͷͨΊͷϓϩτ ίϧΛఆٛ͠Α͏ͱ͍ͯ͠ΔIETFͷWGɻ End-to-End҉߸ԽΛ࣋ͭʢͦΕͦ͏ʣɺ҉߸Խάϧʔϓϝο ηʔδϯά͕Մೳ ಛఆͷϓϥοτϑΥʔϜʹ͓͚ΔID͕ඞཁ
DIDComm Aries RFC 0005: DID Communication Ͱઆ໌͞Ε͍ͯΔDID Agentಉ࢜ ͷίϛϡχέʔγϣϯϝΧχζϜɻ DIDCommͱ͍͏ϓϩτίϧ͕͋Δɺͱ͍͏ΑΓDIDCommͷ্ʹ
֤ΞϓϦέʔγϣϯ͝ͱͷϓϩτίϧΛ࣮͢Δɺͱ͍͏΄͏͕ ͯ·ΔɻExplainerͰ˓×ήʔϜ༻ͷϓϩτίϧΛDIDCommͷ ্Ͱ࣮͍ͯ͠Δɻ
DIDComm ओͳಛͱͯ͠ɺʮඇಉظɺ୯ํ(simplex)ͷϝοηʔδϯάͰ͋ ΔʯʮτϥϯεϙʔτґଘੑΛ࣋ͨͳ͍(transport-agnostic)ʯ ʮEnd-to-end҉߸Խ͞Ε͍ͯΔʯͱ͍͏ੑ࣭͕͋Δɻ ૹΓઌͷൃݟ(discovery)DID RelationshipͷߏஙʹΑͬͯߦΘΕ Δɻ
None
·ͱΊ • Eϝʔϧͷͱͯ͠ʮ҉߸Խ͕ेͰͳ͍ʯ͜ͱʹՃ͑ͯʮ· ͱͳidentity layer͕ͳ͍ʯͱ͍͏͕͋Δ • identity layerͷߏஙΛதԝूݖԽ͞ΕͨEϝʔϧϓϩόΠμʹ· ͔ͤͯ͠·͏ͱEϝʔϧͷࡏతͳself-sovereignੑΛࣦͬͯ͠ ·͏
• DIDVCٕज़ͰEϝʔϧͷidentity layerΛ࡞Δ͔ɺͦͦDIDʹ ΑΔidentity layerΛ࣋ͭϓϩτίϧͰ͋ΔDIDCommʹ͔ͬͬ ͯ͠·͏ͷ͕Α͍ͷͰʁ