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Practical Quantum Cryptography and Possible Attacks

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Google Tech Talks January, 24 2008 ABSTRACT Quantum cryptography is actually about secure distribution of an encryption key between two parties. In this talk I give an introduction to practical quantum cryptography. I will describe the technical details of a few implementations, how the security of the distributed key might be compromised, and what steps can be taken to prevent this. Speaker: Alexander Ling Alexander Ling is a graduate student with the Experimental Quantum Optics group in the Center for Quantum Technologies in Singapore. He has spent the last four years building sources of high-quality polarization-entangled photon-pairs. The entangled light is then used for various things like testing the validity of quantum mechanics and quantum key distribution. He hopes to complete his Ph.D. in 4 months.

Channel: People & Blogs
Uploaded: November 30, 1999 at 12:00 am
Author: googletechtalks

Length: 57:50
Rating: 4.57
Views: 4154

Tags: education  engedu  google  googletechtalks  talk  talks  techtalk  techtalks  

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lithiumdeuteride (November 30, 1999 at 12:00 am)
I'm completely open to TRV, as long as they demonstrate in double-blind tests that they can remotely view randomized computer data. Until this happens, it's total BS. I don't care what the CIA did. That's an appeal to authority, a common logical fallacy.
sonofhendrix (November 30, 1999 at 12:00 am)
This was the military's competitive response to the alleged Soviet psychic warfare program during the cold war. Even though there was a hope for psychic performance, nobody really expected the results that were discovered and put into motion. The most astounding fact was that they (we) had proven that this new psychic technique could be taught like a language and anyone could learn it. OPEN your mind lithiumdeuteride. If everyone closed their minds to new theories we would never advance!
sonofhendrix (November 30, 1999 at 12:00 am)
TRV began between the years of 1982 and 1983 while a prominent psychic who was working with a world-renowned physicist realized a breakthrough discovery in psychic phenomenon. The discovery was the existence of a set of protocols which could produce accurate psychically derived data on a consistent basis using only a trained mind and a stack of plain white paper. The psychic research project was initially funded by the CIA and then later picked up by the DIA.
lithiumdeuteride (November 30, 1999 at 12:00 am)
Furthermore, "technical remote viewing" is pseudoscientific nonsense. I guarantee you any practitioner of this technique would fail utterly in a double blind test. For example, predicting the contents of a computer file filled with random data, when neither the person taking, nor the person administering the test know the contents ahead of time.
lithiumdeuteride (November 30, 1999 at 12:00 am)
It is an inherent physical property of photons that measuring them changes their polarization in a random way. And by changing their polarization in a random way, you turn the message into gibberish, immediately alerting the person receiving it that there is someone snooping in on the conversation. In short, you can't fool nature.
sonofhendrix (November 30, 1999 at 12:00 am)
why?
lithiumdeuteride (November 30, 1999 at 12:00 am)
No, it can't.
sonofhendrix (November 30, 1999 at 12:00 am)
quntum cyptography can be cracked with quntum computers theoretically. And by skilled remote viewers (TRV) teams i would imagine.
CrystalDealer (November 30, 1999 at 12:00 am)
Good vid.
trisetyarso (November 30, 1999 at 12:00 am)
good talks ありがとう ございます

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