Some card readers can establish the connection to the signature card both via the contact surfaces of the card and via radio (RFID). However, the SecSigner can only use the signature card via the contact surfaces. Access to the card via radio is severely restricted, so that not even its type can be detected.So if the SecSigner indicates that the type of the card is unknown, check whether the blue LED for the RFID connection is lit on the card reader. If so, you will need to insert the card again. When SecSigner accesses the card, the green LED for the connection via the contact surfaces must light up.It is also possible to completely switch off the RFID interface in the card reader to avoid this source of error. However, an RFID connection is required if the card reader also needs to be used for logging in to websites with the ID card.