We live in a time where information security is closely linked to numerous internet threats such as hacker attacks, viruses or various other applications that have the function of doing damage to our computer, information system, and therefore information. However, information security needs to be viewed in a broader context. Possible uncontrolled "leakage" of important and valuable information outside the system poses a major threat to the organization, the company. It is safe to say that the "leakage" of information to every organization and company is questionable existence. Also, we can say that information that can often be very important or characterized as secret and confidential, is not always in electronic form, it can also be in written documents, pictures, tables, charts and the like. Cryptography itself is a very effective technique for protecting highly confidential and valuable information from cyber criminals. Nowadays, many large corporations and organizations invest large sums of money to protect their data, so information security is becoming one of the hot topics around the world. The process of encryption and decryption is crucial for the communication of very sensitive information. Awareness that without cryptography private data such as credit card information, passwords and ID card numbers will be available to cyber criminals is very small, it can be said that it is not even given as much attention as it was before. Technological advances have enabled hackers to improve their criminal techniques, so it can be said that even today, by registering your card when shopping online, we are not and cannot be completely sure.