In today's world the use of paper-based information carriers is decreasing, thanks to the development of information technology it is possible to switch to electronic document management systems. But the more the systems develop and the more the methods of information exchange increase, the more often the threats of electronic documents forgery arise.In order to be able to securely exchange data electronically, it is necessary to apply reliable security methods. These methods include cryptographic algorithms for electronic signatures, hashing and encryption.