Degrees of freedom of the field in unconditionally secure wireless communications

The fast growing of personal wireless communications, and the spreading of new services like Internet banking on mobile phones, has made the preventing unauthorized extraction of information a key problem for wireless systems. However, all the ciphering algorithms developed since now can be broken under an attack with unlimited computational resource. Consequently, the final goal of the cryptography is the developing of an unconditionally secure cryptographic system able to resist to any cryptanalytic attack, no matter how much computation power is available.