Practical Quantum Cryptography and Possible Attacks

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.

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[datadigger]

Such a pity 25% of Google talks doesn't have proper audio recording. This is yet another example where bad audio spoils the fun.

[o3q]

great topic, horrible video

[navgahs]

we need some additional subtitle to enjoy the video...

[JIANPIP]

But that experiment does not show if with some eavesdropper, in experimental sense, can hack the signal.

[nazaxprime]

@datadigger Sure is...

Pity your comment will change nothing, and is little more than a brain fart. Look, Its not like hey try to make the audio as bad as they can, so all your doing is... well pretty much nothing, aside from whhhhhiiiiiiiining.

QQ

Maybe we can talk on topic instead of bitching and voting up comments that are totally off topic.

Maybe we can't.

Please don't reply or thumb me, just please stay on topic.

[CogitoErgoCogitoSum]

Does anyone have an English translation of this video?

[surgeyX]

This guy is a TERRIBLE speaker...it's obvious he can barely speak english and there are so many stutters and pauses...ugh...useless video.

[surgeyX]

@sonofhendrix

Everyone has an open mind when it comes to cool stuff...but if test after test after test after test FAILS to show results...it's time to shut the door and bolt it down.

[surgeyX]

@sonofhendrix

Yeah, and then it was closed down because there were no results after 20 million dollars of taxpayer money had been spent on bullshit.

[cakk15]

Sadly this is true.