Quantum computation of perfect time-eavesdropping in position-based quantum cryptography: Quantum computing and eavesdropping over perfect key distribution

In this paper, we proposed the Implementation of Perfect Time Eavesdropping in Position Based Quantum Cryptography. The Security of Quantum Key Distribution lies in the Laws of Quantum Mechanics and is recognized to be one of the most secure cryptography ever known. The major advantage of Position-Based Key Distribution is that an authenticated server or device will be able to use its InterSpace Positions while authenticating in an environment while exchanging a secure key for communication over the network. In Position Cryptography the Authentication is done by verifying that a particular Device holds a definite and fixed position in Space-Time. In this paper, we proposed the experimental Time-Based Attack which evolved as modern day Decoy-Fake Shift Attack. The key idea is: an Attacker Eve can change the Shift of the Key randomly to T1 or T2 with the probability of shift, F and G = 1-F respectively. Also, the attacker can Authenticate and Randomize the Probability F in such a way so that it ensures the Receiver's Detection Ratio is constant i.e. 1:1. So, as a result, the two parties communicating via a secure Quantum channel will not be able to detect the Eavesdropping caused by the attacker and therefore the attacker can have an Authentication over the shared key and can, therefore, the parties will not be able to conceal its information. Thus the secure Position Quantum Cryptography can be broken by this proposed Architecture model. In this paper, we represented the Architecture Model experimentally and the Security Analysis for such an attack has been proposed.

I. Introduction

Safe and Secure Communication network provided by Quantum Key Distribution is needed by humans in various fields like defense, development, science, telecommunication etc. New Technologies in Cryptography was invented and broken and further new technologies are invented for the cause. Quantum Key Distribution is based on the laws of Quantum Mechanics and is the most significant technology in Cryptography [2] [3]. Today Quantum Cryptography is commercial available across 300 km and is also available for Domestic purposes and is considered to be most secure. The security of Quantum Cryptography has been proved, but the physical implementation of it has been a problem for many scientists across the globe. Different kinds of eavesdropping methods have been introduced till date each having their own characteristics and limitations [4]–[6]. We implemented an attack in the QKD assuming that the software credentials and the hardware are known to the Attacker. In this paper, we proposed the Perfect Eavesdropping Attack under normal conditions where the Secret key is shared between the Source “Alice” and the Destination “Bob” [1] over a 30m long connected cable. The communication was started from the source end and after some time the Eavesdropper was able to obtain the same Secret Key as received by “Bob” the receiver. This key was achieved as Eve was able to change the probability of Bob receiving the signal so the Quantum Laws were not disturbed and thus the Attacker was undetected.