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Siemens IT Solutions and Services, Graz University of Technology, and Austrian Research Centers (ARC) claim to have developed the first quantum cryptography chip for commercial use.

The chip, which protects data by generating a random sequence of numbers from photons, replaces the current system of key distribution based on mathematical algorithms.

Quantum cryptography works with photons, which are generated and coded by an optical array. The security of the data is said to be guaranteed as photons generate completely random keys. The mathematical formulae used in the past, which could be decrypted with enough time and effort, will soon be obsolete.

Once the optical array has sent the light particles to the recipient via optic-optic cable, each communication partner uses a detector to measure certain properties of the photons.

The values are then compared using a communication protocol via the internet. If they match, the chip takes over the processing and uses the results of the measurements to generate a tap-proof key.