"New Technology Developed for Quantum Cryptography Applications"

Quantum computing threatens to render the use of classic cryptography for secure communications obsolete. Quantum cryptography applies the laws of quantum mechanics to ensure security. Quantum Key Distribution (QKD) enables two parties to secure a message using a random secret key, which is generated by quantum particles known as photons. In order to accomplish this, scientists are increasingly using an alphabet based on specific properties of light particles (i.e., photons), namely their color composition. However, no equipment had been created to decode the information again. Therefore, researchers at Paderborn University have created such a decoder. They made a multi-output quantum pulse gate (mQPG) that separates incoming letters into various colors, which physicists can identify with a spectrometer. In addition, they have demonstrated a complete, high-dimensional mQPG-based decoder that enables encryption protocols based on individual photons. This article continues to discuss the new technology developed by researchers at Paderborn University for quantum cryptography applications. 

Paderborn University reports "New Technology Developed for Quantum Cryptography Applications"