Journal of Information Security and Cryptography (Enigma)
Email this article Untappable Key Distribution System: a One-Time-Pad Booster
Abstract
The One-Time-Pad (OTP) protocol gives unconditional security
for the information being encrypted. Correctly implemented, not even
an adversary with a quantum computer can crack it. However, the need
of sharing in a secure way supplies of symmetric random keys turned the
method almost obsolete as a stand-alone method for fast and large volume
telecommunication. Basically, this secure sharing of keys and their
renewal, once exhausted, had to be done through couriers, in a slow and
costly process. This paper presents a solution for this problem providing a
fast and unlimited renewal of secure keys: An untappable key distribution
system is presented and detailed. This fast key distribution system utilizes
two layers of confidentially protection: 1) Physical noise intrinsic to the optical
channel that turn the coded signals into stealth signals and 2) Privacy
amplification using a bit pool of refreshed entropy run after run, to eliminate
any residual information. The resulting level of security is rigorously
calculated and demonstrates that the level of information an eavesdropper
could obtain is negligible. The random bit sequences, fast and securely
distributed, can be used to encrypt text, data or voice.
Keywords
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DOI: https://doi.org/10.17648/enig.v2i1.43
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