A quantum leap: Researchers create super-secure computer network

Download A quantum leap: Researchers create super-secure computer network

Post on 06-Jan-2016

20 views

Category:

Documents

3 download

Embed Size (px)

DESCRIPTION

A quantum leap: Researchers create super-secure computer network. Seungjai Min Hansang Bae Hwanjo Heo. Quantum Cryptography?. Uses light particles, photons through optical fiber instead of electric waves on wire - PowerPoint PPT Presentation

TRANSCRIPT

  • A quantum leap: Researchers create super-secure computer networkSeungjai Min Hansang Bae Hwanjo Heo

  • Quantum Cryptography?Uses light particles, photons through optical fiber instead of electric waves on wireA defining discovery in physics: that subatomic particles can exist in multiple states at once until something interacts with them. Eavesdropping on the photons, such as setting up a photo detector to read the code, makes the codes unusable and can be detected.

  • Basic Idea

  • Quantum Key DistributionCore aspect of quantum networkingTwo parties share a key obtained by QKD before data communicationSeparated in two channels: quantum channel and public channelUses different polarization of a photon to encode a bitExample protocols: BB84, B92

  • Working ExamplesThe Boston network(BBN Havard Boston university) is the first internet-integrated system.A group in Europe recently made the first quantum encrypted bank transaction.MagiQ Technologies and id Quantique are selling commercial QKD systems.

  • Pros & ConsNearly Impossible to steal, even with a super-powered computerDetect if someone is listeningSecure randomness, no cloning

    Distance LimitationsAvailabilityExpensive (MagiQ sells it at $50,000 per piece)Vulnerable to DOSKeys cant keep up with data transmission

  • Questions?

Recommended

View more >