Invention:
This technology is a cryptosystem that utilizes atmospheric turbulence over a communication channel as a source of randomness. The cryptosystem utilizes bidirectional modulators at both ends of the communication to remodulate received signals. This method enables key generation and the generation of random sequences to occur independent of the long coherence times of the atmospheric turbulent channel, allowing for secret key rates comparable to data rates achieved in state-of-the-art optical communication methods, while maintaining a level of security comparable to that of quantum key distribution methods.
Background:
Various cryptosystems based on atmospheric turbulence as a source of randomness have been proposed. However, these systems are limited by the long coherence times of atmospheric turbulent channels, and they operate at low data rates. This atmospheric turbulence-based cryptosystem provides further improvements on prior methods by eliminating the need for initializing while still enabling high data rates and maintaining a high level of security, outperforming traditional secret key generation methods in both medium and strong turbulence regimes.
Applications:
- Cryptography
- Data security
- Optical communication
- Quantum communication
Advantages:
- Higher secret key rate
- Higher rates of data transmission
- Increased security
