Implementation of Quantum Key Distribution Protocols

Sheila Cobourne

Mohit Rajpurohit, Kaustubh Moni Deka, Vaibhav Pratap Singh +1 more

Quantum Key Distribution (QKD) is an emerging field in private key cryptography. Recent advancements in quantum cryptography are focused on developing more secure protocols, particularly in response to the real time implementations of quantum hacking. Our research article focuses on Measurement-Device-Independent (MDI) and Twin-Field (TF) Quantum Key Distribution protocols, addressing the challenges associated with their implementation. We have discussed the implementation of a discrete phase randomization technique and phase slicing for Twin-Field (TF) Quantum Key Distribution, along with the integration of a random number generator (RNG). In our work, we designed and implemented initial quantum state preparation and the control electronics for an advanced Quantum Key Distribution system using an FPGA board.

Ramona Wolf

Mohammed Aldarwbi, Ali Akbar Ghorbani, Arash Habibi Lashkari

Abstract Quantum key distribution (QKD) protocols are unconditionally secure, providing that quantum devices are truthful. Device-independent quantum key distribution (DI-QKD) protocols offer the prospect of distributing secret keys with minimal assumptions. The DI-QKD protocols are hard to implement using the current technologies as they require all the quantum devices to be uncharacterized. Measurement device independent quantum key distribution (MDI-QKD) protocols assume that the measurement devices are not truthful; the adversary might make them. MDI-QKD is secure but more challenging to implement. Receiver-device-independent quantum key distribution (RDI-QKD) protocols assume that the receiver's measurement devices can be viewed as a black box while the sender's device can be trusted. RDI-QKD relies on reasonable assumptions that make it easy to implement using the current state-of-the-art technology. We propose an RDI-QKD protocol, called DGL22. DGL22 is secure against all known attacks that are allowed by quantum mechanics. DGL22 provides several benefits over previous protocols, including the capability to attain high communication and sifting efficiency.

Quantum cryptography is a science that exploits quantum mechanical properties to perform cryptographic tasks.The best-known example of quantum cryptography is quantum key distribution, which offers an information-theoretically secure solution to the key exchange problem.I try to generalize the first quantum key distribution protocol called BB84 and implement the protocol in different steps.The implementation is performed in a fully theoretical manner with a general mathematical base.I propose here an algorithm that can make this protocol more secure.After implementation of the protocol, I tried to find out the result, which I illustrated with figures and tables and also proposed here as a suitable polarizer diagram model that helped me find the outcome of this concept.My proposed polarizer diagram only works to encode and decode the valuable secret key that is transferred from sender to receiver, and the secret key will not be transferred as binary bit data but as a photon particle by the photon polarizer converter.Though the protocol BB84 is the most secure of all quantum key distribution protocols, I tried to make it more secure from any third-party access.

R. Lalu Naik