Latest Quantum cryptography Stories

2010-07-27 15:39:09

Uncertainty in the presence of a quantum memory A quantum particle is hard to grasp, because one cannot determine all its properties precisely at the same time. Measurements of certain parameter pairs such as position and momentum remain inaccurate to a degree given by Heisenberg's Uncertainty Principle. This is important for the security of quantum cryptography, where information is transmitted in the form of quantum states such as the polarization of particles of light. A group of...

2010-07-27 13:39:36

Location-based security is ensured by using quantum mechanics A research group led by computer scientists at the UCLA Henry Samueli School of Engineering and Applied Science has proved that cryptography "” the practice and study of hiding information "” that is based solely on physical location is possible by using quantum mechanics. Such a method, the researchers say, allows one to encrypt and decrypt data at a secure location without pre-sharing any cryptographic keys that can...

2010-07-01 12:02:29

Since Richard Feynman's first envisioned the quantum computer in 1982, there have been many studies of potential candidates -- computers that use quantum bits, or qubits, capable of holding an more than one value at a time and computing at speeds far beyond existing silicon-based machines for certain problems. Most of these candidate systems, such as atoms and semiconducting quantum dots, work for quantum computing, but only at very low temperatures. Now a team of researchers from the Wuhan...

2010-06-07 13:56:45

Any physical system - be it an electron, a molecule of water, a virus, a human being, a whole planet "“ is characterized at each moment in time distinctively and specifically in a specific place by particular characteristics. This is what we call the "state of the system", but when one tries to describe said "state" precisely according to our current knowledge of the laws governing the universe, it is necessary to appeal to abstract formulations since the laws of quantum physics, the...

2010-05-24 12:40:00

On Monday, Australian scientists unveiled the world's smallest electronic switch measuring just a few atoms, which will shrink microchips and revolutionize computing speeds. The seven-atom transistor is the first step in a "quantum computer" which will make calculations millions of times faster than existing devices. Michelle Simmons, the lead researcher, said the technology has major implications for code breaking, financial transactions and weather forecasting, which involve testing...

2010-04-21 14:48:27

Rice physicists: Odd electron mix has fault-tolerant quantum registry HOUSTON -- There are enticing new findings this week in the worldwide search for materials that support fault-tolerant quantum computing. New results from Rice University and Princeton University indicate that a bizarre state of matter that acts like a particle with one-quarter electron charge also has a "quantum registry" that is immune to information loss from external perturbations. The research appeared online...

2010-03-31 08:44:48

Largest simulation of an ideal quantum computer; efficient multi-core software developed A quantum computer could provide an enormous improvement in the processing speed of existing computers. However, as yet they only exist in the laboratory in the form of small prototypes with a capacity of a few bits. They can now be explored in more detail, at least in simulations. The Jlich supercomputer JUGENE can now simulate the largest quantum computer system in the world with 42 bits. "The computing...

2010-03-23 13:29:02

TAU scientist invents a digital security tool good enough for the CIA -- and for you A British computer hacker equipped with a "Dummies" guide recently tapped into the Pentagon. As hackers get smarter, computers get more powerful and national security is put at risk. The same goes for your own personal and financial information transmitted by phone, on the Internet or through bank machines. Now a new invention developed by Dr. Jacob Scheuer of Tel Aviv University's School of Electrical...

2010-02-16 13:41:48

Special issue of Journal of Computer Security A special issue of the Journal of Computer Security (IOS Press, ISSN 0926-227X) brings together the research results of six ongoing FP6-IST projects. The editors of the journal invited those projects that received outstanding reviews in the ICT Trust and Security EU-calls to submit their papers. Security and trust are core research issues for the further development of the information society and for ten years have played, and continue to play, an...

2010-02-15 07:30:00

Diamond nanowire device could lead to new class of diamond nanomaterials suitable for quantum cryptography, quantum computing, and magnetic field imaging By creating diamond-based nanowire devices, a team at Harvard has taken another step towards making applications based on quantum science and technology possible. The new device offers a bright, stable source of single photons at room temperature, an essential element in making fast and secure computing with light practical. The finding...

Word of the Day
  • A spider.
  • Figuratively, a peevish, testy, ill-natured person.
'Attercop' comes from the Old English 'atorcoppe,' where 'atter' means 'poison, venom' and‎ 'cop' means 'spider.' 'Coppa' is a derivative of 'cop,' top, summit, round head, or 'copp,' cup, vessel, which refers to 'the supposed venomous properties of spiders,' says the OED. 'Copp' is still found in the word 'cobweb.'