The book "Block Encryption Systems" by A. E. Zhukova is a fascinating and deep dive into the world of cryptography, which will be a real discovery for both professionals and those who are just starting their way in this complex but incredibly interesting area. In today's digital society, where information security is becoming a top priority, understanding the fundamentals of encryption and data protection is of particular importance. Author, A. E. Zhukov is a recognized expert in the field of information security and cryptography. His works are distinguished not only by scientific rigor, but also by the accessibility of the presentation, which makes them attractive to a wide audience. In Block Encryption Systems, he shares his knowledge, experience, and unique perspective on modern information security techniques, making the book an important resource for students, researchers, and practitioners. The book covers many aspects related to block encryption - from the basics of theory to practical applications. Zhukov explains how block ciphers work, what algorithms are used in various systems and how they ensure data security. The reader will be able to learn about such well-known algorithms as AES, DES and others, as well as about the principles of their work and application in real conditions. Topics raised in the book range from the mathematical foundations of encryption to questions related to the practical implementation of algorithms. Zhukov focuses on the importance of choosing the right algorithm depending on the specifics of the tasks and threats that the system may face. This makes the book particularly valuable for information security professionals, software developers, and system administrators. Who can like this book? First of all, it will be of interest to students and graduate students of technical specialties studying computer science and information security . It will also attract the attention of professionals working in the field of software development and data protection. Even those who are simply interested in modern technology and want to understand how encryption systems work will find a lot of useful information in it. Zhukov’s style is distinguished by clarity and logical presentation, which makes it easy to assimilate even the most complex concepts. His approach to explaining the material makes the book not only informative, but also fascinating. The reader not only receives a set of facts and algorithms, but also plunges into the fascinating world of cryptography, where each element has its own meaning and place. In addition, “Block Encryption Systems” can be considered as a continuation of other well-known works of the author, such as “Cryptography: theory and practice”, where it also touches on important aspects of information protection. These books together create a holistic view of cryptography and its significance in the modern world. If you are looking for a book that will help you understand the complex issues of encryption, understand how to protect your data and do it with interest, “Block Encryption Systems” A. E. Zukova is your ideal choice . This work will not only be a useful guide, but also a source of inspiration for further study of cryptography and information security. Do not miss the chance to immerse yourself in a world where every word and every number matter!