What Happens When Quantum Physics Meets Cryptography?


By Paulina Gomez – In today’s world of ever-increasing security threats and breaches, encryption is a common technique used to protect critical information from getting into the wrong hands. In cryptography, encryption is the process of encoding a plaintext message in such a way that only authorized parties can access it. The result of this process is encrypted information, also known as ciphertext. But how is this done exactly? The plaintext message is transformed using an algorithm (or cipher) to make it unreadable to anyone except those possessing special knowledge, which is referred to as the key.

Today’s state-of-art secure communications use advanced mathematics to protect in-flight data leveraging highly secure algorithms, such as in Ciena’s WaveLogic Encryption solution. Even though many cryptographic algorithms used today are publicly available, such as the popular Advanced Encryption Standard (AES), they are very difficult to crack in a reasonable amount of time given the computational power of today’s computers. In fact, the keys used in modern cryptography are so large that breaking the AES-256 standard would require “fifty supercomputers that could check a billion billion (1018) AES keys per second [and] would, in theory, require about 3×1051 years.”

The field of Quantum Cryptography is an area of security research and development focused on the introduction of new technologies that will offer more resistance to the computing power of quantum computers. Quantum cryptography draws its strength from the unpredictable nature of photons – the smallest particles in the universe. more> https://goo.gl/FTh77p

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