Abstract: A credit card shaped element with a dynamic stripe which may be activated or deactivated, where the stripe is formed by a plurality of coils provided along the curve thereof, where the plurality of coils are activated in a sequential manner, where a plurality of proximity sensing coils are provided in series along the curve thereof, where the plurality of coils are formed by one coil contacted at multiple positions along its length by contact pads and where the signals fed to the coils cause an output of a reader coil to output a signals with a minimum slope or where one signal fed to one track has no peaks when the other signal is close to zero.

Abstract: A transaction card comprising a processor connected to at least one coil, the processor being adapted to: receive a signal output by the coil caused by a magnetic field acting on the coil; derive, from the signal, information relating to the card; store the information; and subsequently transmit, to the surroundings, the information by transmitting a corresponding signal to the coil. The transaction card may be adapted to remember the positions at which the information was store to the card, and to output the information at the same positions when information is read from the card. A method for storing and transmitting information to the transaction card.