Security printing branch on the market is becoming more and more popular among printers in order to preserve authenticity of certain products but the technology development eases it on the counterfeiters as well. This is why the security printing is based on software and hardware solutions hardly available to general public. Security printing paper, made during a special papermaking process to contain special threads and fibers, and water marks has an important role, as well as the security printing inks, which can, under various influence change appearance. Other than the materials, the design itself can be the best solution. Ornaments and the fineline patterns that make them can often be a sufficient protection because the equipment the counterfeiters have available usually cannot produce a good enough copy of the original. Different printing techniques combined can also be a means of protection. Document security is defined by the number and quality of the different types of security devices, but despite that counterfeiting as a criminal activity is becoming more and more popular.