PosProc

Easy to use QKD (Quantum Key Distribution) library for post processing.

• Requires Python >= v3.9.5
• Contains implemetation of Cascade and other error correction algorithms (More will be added in future).
• Based on an event based networking engine.
• Includes almost all hashing algorithms for privacy amplification.

Getting Started

Dependencies

1. For authentication using digital signatures: ecdsa-python.

   pip install starkbank-ecdsa
   

2. For making public servers: pyngrok.

   pip install pyngrok
   

3. For pickling python objects to bytes: jsonpickle.

   pip install jsonpickle
   

Simple Installation

1. Clone this repo to your PC (use github desktop, it's much more convenient.).
2. Then in the directory of this repo run the file install.bat.

Developer Installation

1. Clone this repo to your PC (use github desktop, it's much more convenient.).
2. Then in the directory of this repo run the file install_develop.bat.

Simple Authentication Example

Creating the server

from posproc import*

# Create the server
alice = QKDServer('Alice')

# Initialize all the protocols for authentication, error correction, privacy amplification.
alice.Initialize_Events()

# Start the server socket
alice.start_ursina_server()

# Important call for event based networking
alice.start_events_processing_thread()

Creating the client

from posproc import*

# Create the client
bob = QKDClient('Bob')

# Start the client socket
bob.start_ursina_client()

# Initialize all the protocols for authentication, error correction, privacy amplification.
bob.Initialize_Events()

# Important call for event based networking
bob.start_events_processing_thread()

# Cleanly stop the client after everything is done!
time.sleep(0.1) # For waiting until everything is done
bob.stopClient()

The above two files needs to be executed in different terminals. By default this will start a local server on the LOCAL_PORT defined in constants. If the necessary user data is not already stored in the current directory then on first connection it will be created and saved in the file path specified by DATA_STORAGE. And when this client connects again, then authentication will be done using data at server's end.