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Quantum Cryptography

Quantum Cryptography. Group 7 Justin Jones Ashley Robinett Jonathan Bull. Quantum Cryptography. Key Words Classical Cryptography Quantum Cryptography Quantum Physics Photons Eavesdropping Heisenberg’s Uncertainty Principle. Quantum Cryptography.

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Quantum Cryptography

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  1. Quantum Cryptography Group 7 Justin Jones Ashley Robinett Jonathan Bull

  2. Quantum Cryptography • Key Words • Classical Cryptography • Quantum Cryptography • Quantum Physics • Photons • Eavesdropping • Heisenberg’s Uncertainty Principle

  3. Quantum Cryptography • Classical Cryptography- uses mathematical techniques to restrict eavesdroppers • Quantum Cryptography- uses quantum physics to restrict eavesdroppers • Quantum Physics- the branch of physics that deals with atomic and subatomic particles and the energy of atoms

  4. Quantum Cryptography • Photon- one of the elementary particles whose interactions with electrons and atomic nuclei account for the features of matter • Eavesdropping- the intercepting of conversations by unintended recipients • Heisenberg’s Uncertainty Principle- tells us that merely observing a quantum object alters it

  5. Quantum Cryptography • What It Is • Developed by Stephen Weisner in the early 1970’s • In 1991, the first prototype was made operable only over a distance of 32 centimeters • (February 2006) Hoi-Kwong Lo’s study describes the first experimental proof of a quantum decoy technique to encrypt data over a fiber optic cable

  6. Quantum Cryptography • Varies the intensity of photons and introduces “photonic decoys” • Photons carry complex encryption keys through fiber optic cables • Afterwards, a second broadcast tells the receiving computer which photons carried the signal and which ones were decoys

  7. Quantum Cryptography • If a hacker tries to eavesdrop on the data stream to try and figure out the encryption key, the mere act of eavesdropping changes the decoys- which tells the computer that the data has been tampered with

  8. Quantum Cryptography • Benefits • Allows the transmission of sensitive information (banking records, personal info, etc.) • Allows more security for online banking • Can be implemented now because the experiment was done with a commercial device

  9. Quantum Cryptography • Benefits • Increases the distance that information can sent up to 100 km • Confuses hackers and eavesdroppers • Merely looking electronically at the photon keys will automatically change their shape and render them useless in unlocking the information • Both sender and receiver can know if someone is eavesdropping or not

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