Abstract

The notion of electronic document is significantly broader than the notion of registration. Any reproduction can be made on computer support, consisting of numerical data, texts, graphics, static or animated images, sound or voice recordings. In order for the reproduction on this mechanism to record legal acts or facts, it is necessary to present it in a form that allows its automatic reading and processing by the interested subjects. This is where the digital signature comes in, which allow us to verify the source (authentication) of information received through telecommunications networks and certify that the data has not been altered along the way (integrity). This can already be achieved by using conventional (symmetric) cryptography or private key cryptography, but digital signatures also guarantee that the signer of a digitally signed message will not subsequently relinquish its "ownership" over the message (non-repudiation of the source). The paper presents a concept of integrated protection of computerized systems using digital signatures.