контекст:

they are able to download new pieces of information - from topping up a travel card, to new songs, ticket information and electronic keycard data etc.

Заранее всем спасибо!

electronic keycard data - данные для электронного ключа

electronic keycard system - (используемая в здании, фирме, отеле) система электронных ключей (и замков)

"In an effort to overcome the drawbacks of physical keys, electronic keycards, punch cards and smart cards have been devised to take the place of physical keys. With an electronic keycard, a magnetic strip on the keycard is encoded by a keycard supplier such that the keycard may be used to open a lock having a magnetic stripe reader. Punch cards make use of a pattern of holes in a card which are used with an optical reader or physical pins to identify a pattern used to open a lock. Smart cards include a built-in microprocessor and memory used for identification. When inserted into a reader, the smart card transfers data to and from a central computer. It is more secure than a magnetic stripe card and can be programmed to self-destruct if the wrong passcode is entered too many times."

http://www.freepatentsonline.com/6975202.html