Nano-optical elements – a new breakthrough direction in security technology. Electron beam origination technology is in use for production of originals of nano-optical elements. E-beam lithography provides with a wide range of security features both for visual and instrumental control of authenticity of optical elements. DeColor effect is an example of such security feature based on asymmetrical microrelief. The effect is easy for verification: from a normal viewing position an observer sees one image, but after rotation of an element through 180 degrees, an observer sees a different image in the same place. The feature is recorded with accuracy of 20 nanometers but allows sure verification by naked eye. Another example of security features for visual control is the SmartGlint effect, which forms a full and wide ranging parallax movement of symbols. These developments are already in use for protection of passports, bank notes, IDs, excise stamps and brands in many countries.