A tertiary review on quantum cryptography

Quantum computers impose an immense threat to system security. As a countermeasure, new cryptographic classes have been created to prevent these attacks. Technologies such as post-quantum cryptography and quantum cryptography. Quantum cryptography uses the principle of quantum physics to produce theoretically unbreakable security. This tertiary review selected 51 secondary studies from the Scopus database and presented bibliometric analysis, a list of the main techniques used in the field, and existing open challenges and future directions in quantum cryptography research. The results showed a prevalence of QKD over other techniques among the selected papers and stated that the field still faces many problems related to implementation cost, error correction, decoherence, key rates, communication distance, and quantum hacking.