← Back to the reading view
Slides · 4 slides
End-to-end encrypted messaging: the Signal Protocol
The same module told visually, ready to present. Speaker notes carry the full explanation.
Protocols
End-to-end encrypted messaging
The Signal Protocol encrypts so not even the server operator can read your messages
End-to-end encrypted messaging: the Signal Protocol · Classical Crypto Today1 / 4
Starting a chat
X3DH: a key exchange with someone offline
End-to-end encrypted messaging: the Signal Protocol · Classical Crypto Today2 / 4
Every message, a new key
The Double Ratchet
End-to-end encrypted messaging: the Signal Protocol · Classical Crypto Today3 / 4
The chain
A one-way chain of keys
Each chain key is deleted after use, so a stolen key can't run the chain backwards
End-to-end encrypted messaging: the Signal Protocol · Classical Crypto Today4 / 4
1 / 4
Keys: ← → move, F full screen, G all slides, N notes