Cryptographic methods of information protection . Part 2 . Algorithms, methods and means of ensuring confidentiality, authenticity” is an important and relevant publication that will become an indispensable assistant for information security specialists, students, as well as anyone interested in modern data protection technologies. The authors, representing a team of experts, gathered in this work extensive experience and knowledge to offer the reader a deep understanding of cryptographic methods and their practical application. The second part of the book continues the research of the topics raised in the first part, and deepens into algorithms and methods that ensure the confidentiality and authenticity of information. The reader is immersed in a world of complex mathematical models and algorithms such as AES, RSA, and many others that are used to encrypt data and protect it from unauthorized access. Each section of the book is filled with examples and practical tasks, which allows not only to theoretically understand the material, but also to apply it in practice. The book will be of interest not only to professional cryptographers and IT specialists, but also to students of technical universities studying information security, as well as to anyone who wants to understand the basics of data protection in the digital world. It is also suitable for managers and executives who want to better understand how to protect their organization from cyber threats. One of the key themes of the book is the importance of ensuring the confidentiality and authenticity of information in the face of growing cybersecurity threats. The authors emphasize that in today's world, where data is becoming a major asset, their protection comes to the fore. The reader will learn about various authentication methods, digital signatures and protocols that help to guarantee the integrity and authenticity of information. The style of the authors is distinguished by clarity and accessibility of the presentation, which makes even complex concepts understandable to a wide audience. They use a variety of illustrations and graphs, which allows you to visualize information and facilitates the perception of the material. The book also includes many practical examples, making it not only a theoretical but also a practical guide. If you are looking for a literature on cryptography that combines theory and practice, then “Cryptographic methods of information protection. Part 2 will be a great choice. It can be useful for both beginners and experienced professionals seeking to update their knowledge in the rapidly changing world of technology. In addition, this edition will be interesting for those who want to delve into topics such as blockchain, secure communications and the protection of personal data. The book could be a starting point for further study of works such as William Stollings's Cryptography and Network Security or Christopher K.'s Fundamentals of Cryptography. Quinn . In conclusion, “Cryptographic methods of information protection . Part 2" is not just a book, but a whole world of knowledge that will open before you. It will help you understand how to protect your data in the era of digitalization and cyber threats, and will become a reliable source of information for everyone who wants to be one step ahead in the field of information security.