The protection of printed documents plays an important role in the information security of the state. The problems of the development of graphic methods of document protection are analysed. The analysis showed that there is a certain gap in document protection and the control of originality, and also the need for effective protection of documents to prevent their falsification. The possibility to improve the protection result by using latency for the effectiveness of document security is considered. This method allows providing a high level security of information in printed form, leaving no room for possible falsifications even on modern copier devices. The technology of protection involves the creation of protective elements based on the release of latency when attempting to falsify documents. Information technology is developed at the stage of document preparation for printing. The method of protecting printed documents, showing which latent images remain promising in protection, is analysed. The main threats for printed and electronic publications and types of falsifications are determined. The basic principles of protection have been constructed, which ensure the reliability and integrity of the document containing a hidden element. The research of scanned images has revealed that the original document does not match its copy. The article describes the method of identifying means of their unique features. The methods of selecting multiple image keys are explored and they are compared with the corresponding keys of the reference images. The method can be applied in various ways, for example, to recognize graphic elements. The advantages of this method are simplicity of circuit design, increased speed, and accuracy of identification. The results of application of the elemental comparison method for recognition of latent images are proved, which confirms its efficiency. For the protection of documents, a fairly wide range of defence methods is used, each of which is characterized by a certain degree of reliability and has its own specificity, which consists in determining the assessment of threats to the documents, the conditions of their circulation and application. Moreover, it should be noted that any protection will only be effective if it is constantly improved and outpaces the technical and financial capabilities of the initiators of attacks.
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