"Cryptology and Network Security" is a comprehensive collection of expert contributions documenting the results of the 8th International Conference on this topic. This conference took place in December 2009 in Kanazawa, Japan, and brought together experts from around the world to discuss current developments and challenges in the field of cryptology and network security. The 32 revised full texts, selected from 109 submitted papers, cover a wide range of topics, including cryptographic protocols, security analyses, as well as privacy and anonymity. The careful selection and review of the contributions ensure a high level of scientific quality and relevance. The work is organized into thematic sections, allowing readers to find targeted information on specific aspects of network security and cryptology. This publication is aimed at professionals, researchers, and students who wish to engage with the latest developments in these dynamic and critical fields.