This book constitutes the refereed proceedings of the 25th International Conference, ICISC 2022, held in Seoul, South Korea, during November 30–December 2, 2022. The 24 full papers included in this book were carefully reviewed and selected from 69 submissions. They were organized in topical sections as follows: ​Public Key Encryption with Hierarchical Authorized Keyword Search, Implicit Key-stretching Security of Encryption Schemes.

Electronics, communication and networks coexist, and it is not possible to conceive of our current society without them. Within the next decade we will probably see the consolidation of 6G-based technology, accompanied by many compatible devices, and fiber-optic is already an advanced technology with many applications. This book presents the proceedings of CECNet 2022, the 12th International Conference on Electronics, Communications and Networks, held as a virtual event with no face-to-face participation in Xiamen, China, from 4 to 7 November 2022. CECNet is held annually, and covers many interrelated groups of topics such as electronics technology, communication engineering and technology, wireless communications engineering and technology and computer engineering and technology. This year the conference committee received 313 submissions. All papers were carefully reviewed by program committee members, taking into consideration the breadth and depth of research topics falling within the scope of the conference, and after further discussion, 79 papers were selected for presentation at the conference and for publication in this book. This represents an acceptance rate of about 25%. The book offers an overview of the latest research and developments in these rapidly evolving fields, and will be of interest to all those working with electronics, communication and networks.

This book constitutes selected papers from the 24th International Conference on Information Security and Cryptology, ICISC 2021, held in Seoul, South Korea, in December 2021. The total of 23 papers presented in this volume were carefully reviewed and selected from 63 submissions. The papers are arranged by topic: Cryptographic Protocol in Quantum Computer Age; Security Analysis of Hash Algorithm; Security analysis of Symmetric Key Encryption Algorithm; Fault and Side-Channel Attack; Constructions and Designs; Quantum Circuit; Efficient Implementation. The aim of this conference was to provide an international forum for the latest results of research, development, and applications within the field of information security and cryptology.

This volume LNCS 14252 constitutes the refereed proceedings of 25th International Conference on Information and Communications Security, ICICS 2023, held in Tianjin, China, during November 18–20, 2023. The 38 full papers presented together with 6 short papers were carefully reviewed and selected from 181 submissions. The conference focuses on: Symmetric-Key Cryptography; Public-Key Cryptography; Applied Cryptography; Authentication and Authorization; Privacy and Anonymity; Security and Privacy of AI; Blockchain and Cryptocurrencies; and System and Network Security.

This volume LNCS 14217 constitutes the refereed proceedings of the 17th International Conference on Provable and Practical Security, ProvSec 2023, held in Wuhan, China, during October 2023. The 20 full papers presented together with 3 short papers were carefully reviewed and selected from 71 submissions. The conference focuses on Fundamentals & Cryptographic Primitives; Cryptanalysis; Signature; Encryption; Privacy Preservation; and Blockchain Security.