India, Aug. 4 -- ​​​Quantum cryptography, which promises to significantly enhance the security of communications, has not yet revealed all its secrets.

Through the Carnot SEQUANCES project, CEA-Leti has substantially deepened its understanding of these systems by investigating potential physical attacks targeting the optical-to-digital interface that could threaten their security.

Quantum cryptography should not be confused with post-quantum cryptography (PQC). Unlike PQC and conventional cryptography, which rely on mathematical approaches, the security of quantum cryptography is based on the laws of quantum physics.

Investigating potential physical attacks on QKD systems

One of the main quantum cryptography protocol...