Secure and convenient replacements of traditional keys. The contactless cards that we use are based on the RIFD technology. They work through a microchip and a radio antenna that allows for information exchange without physical contact between the card and the reading device. This type of cards are widely spread in access control systems worldwide. They are much safer, easier to use (they just have to be put near the reader) and with longer life compared to cards with magnet or barcode. The application of the contactless technology allows for the reader to be hidden in the door leaf and stay invisible. That increases the intelligent protection system’s (iPS) security level.