This book constitutes the proceedings of the 19th International Colloquium on Theoretical Aspects of Computing, ICTAC 2022, which took place in Tbilisi, Georgia, in September 2022. The 23 papers presented in this volume together with 2 short papers were carefully reviewed and selected from 52 submissions. The book deals with challenges in both theoretical aspects of computing and the exploitation of theory through methods and tools for system development.

This book constitutes the proceedings of the 20th International Colloquium on Theoretical Aspects of Computing, ICTAC 2023, which took place in Lima, Peru, during December 4–8, 2023. The 20 full papers presented in this volume together with 3 invited papers and 1 tool paper were carefully reviewed and selected from 40 submissions. They were organised in the topical sections as follows: Bring Together Practitioners; Researchers from Academia; Industry; Government to Present Research Results and Exchange Experience and Ideas.

This book constitutes the proceedings of the 17th International Conference on Theoretical Aspects of Software Engineering, TASE 2023, held in Bristol, UK, July 4–6, 2023. The 19 full papers and 2 short papers included in this book were carefully reviewed and selected from 49 submissions. They cover the following areas: distributed and concurrent systems; cyber-physical systems; embedded and real-time systems; object-oriented systems; quantum computing; formal verification and program semantics; static analysis; formal methods; verification and testing for AI systems; and AI for formal methods.

This book constitutes the refereed proceedings of the 22nd International Conference on Cryptology and Network Security, CANS 2023, which was held in October/November 2023 in Augusta, GA, USA. The 25 papers presented were thoroughly revised and selected from the 54 submissions. They are organized in the following topical sections: Schemes I; Basic Primitives; Security; MPC with Cards; Blockchain; MPC and Secret Sharing; Schemes II.

This volume LNCS 14300 constitutes the refereed proceedings of the 18th International Conference, IFM 2023, in November 2023, held in Leiden, The Netherlands. The 16 full papers presented together with 2 short papers were carefully reviewed and selected from 51 submissions. The conference focuses on all aspects of the design of integrated techniques, including language design, verification and validation, automated tool support, and the use of such techniques in software engineering practice.