ITU-T Recommendations

Based on Recommendation ITU-T Y.3800, many study items have been successfully developed and others are still being developed. However, in cases where mobile objects (i.e., autonomous car, mobile phone, etc.) are to be supplied with a quantum key distribution (QKD) service, there is a difficulty to establish and maintain a quantum channel with them in a stable manner. Key supply agent-keys (KSAkeys) are not able to be supported in this situation.
KSA-keys generated from a quantum key distribution network (QKDN) to mobile objects can be delivered through a user network using modern cryptography technology (especially a key exchange protocol).
Therefore, the integration of a QKDN with non-quantum cryptography will enable the QKDN and service providers to bring the cryptography service to a much wider range of businesses.
For this purpose, the relationship between the QKDN and end-to-end (E2E) cryptography services will be introduced in this Supplement. Then, relative use cases for the integration of QKDN with non-quantum cryptography will be described. Finally, based on the analysis of the detailed attributes of use cases, implications for further study will be identified.