How scientists made fast quantum communication possibleApril 30th, 2009 - 4:36 pm ICT by ANI
Washington, April 30 (ANI): Researchers from Toshiba and Cambridge University’s Cavendish Laboratory have developed high speed detectors that are capable of receiving information with much higher key rates, thereby able to receive more information faster, in a technique known as quantum cryptography.
Carried in the journal paper, ‘Practical gigahertz quantum key distribution based on avalanche photodiodes’, the research details how quantum communication can be made possible without having to use cryogenic cooling and/or complicated optical setups, making it much more likely to become commercially viable soon.
One of the first practical applications to emerge from advances in the often baffling study of quantum mechanics, quantum cryptography has become the soon-to-be-reached gold standard in secure communications.
Quantum mechanics describes the fundamental nature of matter at the atomic level and offers very intriguing, often counter-intuitive, explanations to help us understand the building blocks that construct the world around us.
Quantum cryptography uses the quantum mechanical behaviour of photons, the fundamental particles of light, to enable highly secure transmission of data beyond that achievable by classical encryption.
The photons themselves are used to distribute keys that enable access to encrypted information, such as a confidential video file that, say, a bank wishes to keep completely confidential, which can be sent along practical communication lines, made of fibre optics.
Quantum indeterminacy, the quantum mechanics dictum which states that measuring an unknown quantum state will change it, means that the key information cannot be accessed by a third party without corrupting it beyond recovery and therefore making the act of hacking futile.
While other detectors can offer a key rate close to that reported in this journal paper, the present advance only relies on practical components for high speed photon detection, which has previously required either cryogenic cooling or highly technical optical setups, to make quantum key distribution much more user-friendly.
Using an attenuated (weakened) laser as a light source and a compact detector (semiconductor avalanche photodiodes), the researchers have introduced a decoy protocol for guarding against intruder attacks that would confuse with erroneous information all but the sophisticated, compact detector developed by the researchers.
According to the researchers, “With the present advances, we believe quantum key distribution is now practical for realizing high band-width information-theoretically secure communication.” (ANI)
- Scientists build largest ever quantum key distribution network - Jul 02, 2009
- New switching device to help build an ultrafast quantum Internet - Mar 11, 2011
- Quantum mechanics allows 'cryptography over longer distances' - Oct 20, 2010
- World's most efficient single photon detector developed - Apr 16, 2010
- Hackers perform first 'invisible attack' on quantum cryptographic systems - Aug 30, 2010
- NewGen optical integrated devices for future photonic quantum computers - Mar 02, 2011
- Researchers control behavior of quantum dots with lasers - Aug 20, 2008
- Scientists achieve breakthrough in quantum control of light - May 31, 2009
- 'Beam me up Scotty' comes closer to reality with teleportation breakthrough - Apr 16, 2011
- Soon, computers that are cooler and faster - Dec 15, 2009
- Scientists perform 9.9 miles teleportation feat - Jun 08, 2010
- World Cup deploys new technology to baffle hackers - Jun 22, 2010
- Commercial quantum cryptography system hacked - May 22, 2010
- Diamond-based nanowire devices advance quantum science and technology - Feb 15, 2010
- Combining 6 photons together results in highly robust quantum information - Oct 06, 2009
Tags: atomic level, avalanche photodiodes, cambridge university, cavendish laboratory, communication lines, fibre optics, fundamental nature, fundamental particles, intuitive explanations, mechanical behaviour, nature of matter, optical setups, practical communication, quantum communication, quantum cryptography, quantum indeterminacy, quantum mechanics, quantum state, research details, speed detectors