Tag Archives: Cryptography

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

Quantum Information: Changing the Rules of the Game

By Carl Miller – In the early 20th century, physicists found things going on at the subatomic level that were very hard to explain. Basic ideas of what it means to be in a “position” and “state” were called into question.

In my everyday life, I can put my car key on the kitchen counter, or I can leave it in my pocket, but I can’t do both. I may forget where I put it afterward, but unless one of my cats got to it, it’s still in one place or the other.

At the subatomic scale, things are … different. A key that behaved according to quantum rules could be both in my pocket and on the counter at the same time. And when I check to see where it is, it would randomly end up in one location or the other. This is the idea of quantum superposition, and it was eventually decided that, as strange as it seems, this concept provides the right way to explain the results of certain experiments.

Going further, two particles can be linked, or “entangled,” in a superposed state, which means that observations of the two will always agree, no matter how far apart they happen to be. more> https://goo.gl/CJp8Za

Draft NIST Publications (FIPS, Special Publications)

NIST – Draft NIST Publications (FIPS, Special Publications) that are either open for public review and to offer comments, or the document is waiting to be approved as a final document by the Secretary of Commerce.

more> http://tinyurl.com/3yc4fju


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