Unbreakable code – really!

Scientists have produced the first unbreakable encryption in Vienna.

An unbreakable encryption has been unveiled at a scientific conference in Vienna.

Being used to guard a computer network, the encryption is built using quantum cryptography. Quantum theory works off the principle that information can’t be measured without changing it.

The network is built using optic fibre links. Each node on the network contains sensitive light detectors, which identify the photons – atoms of light – sent and translate them into a numerical key to decode data just like a normal computer network. Roughly a million photons a second was sent in the demonstration at the Vienna conference.

If anyone tries to listen in on the transfer between in the network, the photons become scrambled. Once the scrambling reaches a certain rate, the system automatically shuts down without being compromised.

Source: BBC Science