Aleshin Alexander Pavlovich - head of the security service of a commercial organization. Basic education and work experience in various commercial structures allowed us to delve into the problem of protecting a business from various risks using technical means. With the advent of property, the need to protect it arose. The degree and possibilities of protection in different periods of the development of human society were different and depended on the level of economic development of society and the availability of technical means of protection. Today, in the context of the existence of a variety of forms of ownership, the concern for its protection falls primarily on the owner himself. This book will provide basic knowledge about existing threats when doing business in Russia. The book discusses various aspects of the use of modern technical means in the protection of administrative buildings, industrial facilities, problems of personal identification, as well as issues of information security, etc. In a market economy and free enterprise, this book can be a valuable practical and theoretical guide for the widest circle of people associated with business - from directors of large and small enterprises to private detectives, security guards, law enforcement officers.