LETI: Encryption system

2023: Building the System

At the end of December 2023, Russian researchers from the St. Petersburg State Electrotechnical University "LETI" announced the development of a specialized random sequence generator for encryption. The domestic cryptographic system is based on the principles of radiophotonics and optics.

According to TASS, scientists from the FTI named after A.F. Ioffe. Experts say that when encrypting data, including in high-speed communication systems, software is usually used to generate keys from random symbol sequences. The disadvantage of this method is the theoretical possibility of hacking using the "brute force" method: attackers use powerful computer complexes that, by enumerating combinations or calculating the logic of a particular encryption system, can crack keys. The proposed method is based on a different approach.

LETI has created a reliable encryption system based on new principles

The generator developed by Russian specialists consists of an optical pair of a quantum cascade laser and a quantum cascade detector. The laser at the physical level generates random pulse sequences (with different intensities) that are resistant to external influences. This is said to make the system virtually invulnerable to hacking.

The laser and detector were created at the FTI named after A.F. Ioffe in collaboration with the production company Connector Optics LLC. The device operates in the microwave communication band using the principles of radiophotonics: this allows it to be integrated directly into advanced data transmission systems. The production of such generators can be mastered in a short time, since the applied technologies of integral photonics are available to the domestic industry. Another advantage of the system is its relatively small size.^[1]

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