Joseph Jaeger Igors Stepanovs Alice and Bob want E2E secure - PowerPoint PPT Presentation

Aug 14, 2023 •282 likes •475 views

Optimal Channel Security Against Fine-Grained State Compromise: The Safety of Messaging Joseph Jaeger Igors Stepanovs Alice and Bob want E2E secure communication But what about E2E Tools? Plenty of Theory Symmetric encryption Asymmetric

Optimal Channel Security Against Fine-Grained State Compromise: The Safety of Messaging Joseph Jaeger Igors Stepanovs
Alice and Bob want E2E secure communication But what about E2E Tools? Plenty of Theory … Symmetric encryption Asymmetric encryption Session key exchange Signatures TLS is for web servers! ≠ … PGP is a pain! Emerging as most Messaging Apps convenient & usable. 2
E2E Messaging Apps Whatsapp alone encrypts ~55 billion messages/day. Apps Targeting E2E Security: Signal ~700 million iPhones in use. WhatsApp Skype (Private Conversations) Understanding their security is important! Facebook Messenger (Secret Conversations) iMessage These are all based on Open Whisper System’s Double Ratchet Algorithm . (i.e. the techniques of Signal) Telegram (Secret Chats) We aim to better understand its goal: Viber Security against state compromise Many more… 3

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