The book "Temporary permutations for the protection of speech messages: manual for laboratory work on the course "Digital processing of speech and images" by Boriskevich A . A. It is a unique publication that not only immerses the reader in the world of digital processing, but also reveals important aspects of information protection in the modern digital space. This manual will become an indispensable assistant for students, graduate students and anyone interested in the processing of speech signals and their safety. The focus of the book is on temporary permutations a method that allows you to effectively protect speech messages from unauthorized access and forgery. Author, A. A. Boriskevich, shares his knowledge and experience, explaining how timeshifts can be used in a variety of applications, from telecommunications to security systems. The book not only describes the theoretical foundations, but also offers practical tasks that will help readers consolidate their knowledge and skills. Who can like this guide? First of all, it will be interesting for technical students studying digital signal processing, as well as specialists in the field of information security . If you are passionate about new technologies, programming or just want to understand how data protection works in the modern world, then this book will be a real find for you. It is suitable for both beginners and more experienced readers who want to deepen their knowledge in this area .. The topics raised in the book cover a wide range of issues related to speech signal processing and protection. Boriskevich focuses on the importance of information security in the face of growing cybersecurity threats. It discusses various methods of data protection, including encryption and coding, and shows how timeshifts can become an effective tool in this process. The book emphasizes that in the modern world, where information is becoming increasingly vulnerable, knowledge of protection methods becomes necessary for any specialist. The author's style is distinguished by clarity and accessibility, which makes complex technical concepts understandable to a wide audience. Boriskevich uses many examples and illustrations to facilitate the perception of the material. His previous works, such as Digital Signal Processing and Fundamentals of Information Security, have also been recognized for their practical focus and deep immersion in the topic. The book "Temporary changes to protect speech messages" not only enriches the reader's knowledge, but also inspires further study of digital technologies and their application in real life. It will be an excellent addition to the library of anyone who is interested in modern approaches to the processing and protection of information. If you are looking for a source that will help you understand complex concepts and put them into practice, this guide is exactly what you need. Do not miss the opportunity to deepen your knowledge in the field of digital processing and protection of voice messages . Boriskevich’s book is not just a textbook, but a real guide to the world of technology that will help you become an expert in your field.