mobile-sec-notifier

Two chat participants [A]lice and [B]ob. Send encrypted messages indirectly via the server between A and B. A and B in distinct networks.

TODO:

• Protocol
• Server (python)
• Python-Client
• Android-Client

Prototype 1:

• Python-Server & Python-Test-Client
  • Exchange messages server<->client using protobuf
• Android-Client
  • Grab notifications
  • Communicate with grpc service
• Create protocol

Prototype 2:

• Python-Test-Client:
  • Register to server / authenticate at the server
  • Establish ephemeral key with target client
    • Client-to-client key exchange (asym. encryption)
  • Exchange messages using AES with ephemeral key

Prototype 3:

• Harden against attacks (for reference: https://core.telegram.org/techfaq#protection-against-known-attacks)