Supplement 70 to ITU-T Y-series Recommendations (07/2021) ITU-T Y.3800-series – Quantum key distribution networks – Applications of machine learning Summary History FOREWORD Table of Contents 1 Scope 2 References 3 Terms and definitions 3.1 Terms defined elsewhere 3.2 Terms defined in this Supplement 4 Abbreviations and acronyms 5 Conventions 6 Overview 7 Application of ML to the quantum layer of a QKDN 7.1 Introduction 7.2 Use case QL01: ML-based quantum channel performance prediction 7.3 Use case QL02: ML-based QKD system parameter optimization 7.4 Use case QL03: ML-based RUL prediction of components in a QKD system 8 Applications of ML in the key management layer of a QKDN 8.1 Introduction 8.2 Use case KM01: ML-based key formatting 8.3 Use case KM02: ML-based key storage management 8.4 Use case KM03: ML-based suspicious behaviour detection in the key management layer 9 Applications of ML in the control and management layers of QKDN 9.1 Introduction 9.2 Use case CML01: ML-based data collection and data pre-processing 9.3 Use case CML02: ML-based routing 9.4 Use case CML03: ML-based QKDN fault prediction Bibliography <\pre>