Explain Quantum Cryptography to me like you would a 4 year old child

[edscdk]

isnt it jsut a lazy mans way of sharing the key? - ie you can bung it down the same wire the data is going to go down because you should know is someone snoops it while its in transit? - with the added advantage you know if someone is snooping at any point - however it does not help with the keylogger on the senders machine...

completely usless in 99.9% of situations where your staff / operators get paid off, staff machhines get compromised or servers hacked?

 

[bledd]

You realise that the word 'Quantum' is the go to word to cover for the fact that people know it works but don't know why.

I like it, so it's a quantum hangover if you get one after only 5 pints

 

[Name]

Hey there,

Revising for tomorrows exam, I'm still not understanding Quantum Cryptology.

I think it's too late.

 

[6thElement]

It's like the last 30 seconds of this:

 

[Ilikeitblackplease]

You could write something related to it, and make it hard to understand and plug in some related words, and if he marks you down you can always say " you havent grasp the concept of this "

 

[Loosecannon]

In a strange co-incidence there was a GCSE ICT question on their paper yesterday:

Can you explain Quantum Cryptography (3 marks)

See, GCSE's always just get easier!

 

[Ev0]

Seems that the problem in traditional cryptography is the 'Key distribution problem' when using a secret key to encode/decode. Two people can't pass the information between them about the secert key they will be using, without having to have a secret key again to pass this info. So in essence it's a catch 22.

This is why you get hybrid systems that mix up symmetric and asymmetric encryption, such as used in SSL.

The advantage of quantum key distribution is that you are able to detect/know when the key has been snooped on by someone else.