Secure P2P messaging chat

1. Pre register protocol

Generate and store pi_0, pi_1 and c

2. Client-Server secure connection

Key exchange

Communication

3. Client-Client secure connection

Key exchange

Communication

Same as 2: AES GCM using k_ab, k_ba and N

Setup

1. Create virtual env

python3 -m venv env

2. Install dependencies

pip install -r requirements.txt

3. Pre register

./pre_register.py user_a root_server userapass
./pre_register.py user_b root_server userbpass

How to run?

• To display help: ./client.py --help
• To run in verbose mode: ./client.py --verbose
• To exit write exit in all terminals

Step by step

1. Open the server in a new terminal

./server.py

2. Open the client B in a new terminal

./client.py user_b 127.0.0.1:8001 --point-a user_a

3. Open the client A in a new terminal

./client.py user_a 127.0.0.1:8002 --point-b user_b

Server interactive session

Run allowed commands: ip_signup, get_ip, update_ip, update_pass, exit NOTE: make sure to be registered before or run ip_signup

./client.py user_a 127.0.0.1:8001 --server-interactive-session

Demo