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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Tagged Broadband, Cryptography, Internet, Physics, Quantum Computing, Technology
Physicists Are ‘Breeding’ SchröDinger’s Cat, And It Could Reveal The Limits of The Quantum World
By Bec Crew – Physicists have figured out how to ‘breed’ Schrödinger’s cat – an object in a quantum superposition of two states with opposite properties – to produce enlarged versions that could one day reveal the limits of the quantum world.
If they can continue to breed their ‘cats’ even bigger, the experiment could finally reveal the exact point at which objects switch between classical and quantum physics – the divide between the microscopic and macroscopic worlds that physicists have been chasing for decades.
The original Schrödinger’s cat thought experiment states that if you put a live cat in an explosion-proof box with a bomb, until you open the box, you’ll have no idea if the bomb exploded and the cat died. Or maybe the bomb didn’t explode and the cat is still alive.
From our perspective, as long as the box is shut, the cat is occupying two realities. It’s both dead and alive, because we can’t confirm which one, but we know it can’t be neither.
This isn’t just a hypothetical question – in quantum physics, being in two different states at the same time is known as a superposition state, and it’s the entire basis of quantum computing, which is set to revolutionise how we process data in the future. more> https://goo.gl/XMFMB6
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Tagged Business, Business improvement, Electronics, Optical fiber, Physics, Quantum Computing, Quantum mechanics, Quantum state, Technology, United States
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Tagged Broadband, Industrial economy, Internet, Physics, Quantum Computing, United States
A harmonic oscillator in classical mechanics (A-B) and quantum mechanics (C-H). In (A-B), a ball, attached to a spring, oscillates back and forth. (C-H) are six solutions to the SchrÃ¶dinger Equation for this situation. The horizontal axis is position, the vertical axis is the real part (blue) or imaginary part (red) of the wavefunction. (C,D,E,F), but not (G,H), are stationary states (energy eigenstates), which come from solutions to the Time-Independent SchrÃ¶dinger Equation.
(Photo credit: Wikipedia)
R&D Magazine – Using photons as the particles, the University of Bristol team constructed a quantum optical circuit that recycled one of the photons to set a new record for factoring 21 with a quantum algorithm–all previous demonstrations have factored 15.
Anthony Laing, who led the project, says, “Quantum computers promise to harness the counterintuitive laws of quantum mechanics to perform calculations that are forever out of reach of conventional classical computers. Realizing such a device is one of the great technological challenges of the century.” more> http://tinyurl.com/8mwszds
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Tagged Anthony Laing, Nature Photonics, Photon, Physics, Quantum algorithm, Quantum computer, Quantum Computing, Quantum mechanics, University of Bristol