Abstract: A security device for credit cards, charge cards, cash cards and the like has a base, an integrally molded top partially extending along the length of the base and a lid pivotally secured to one end of the base. A key pad is recessed into the top. The lid has an electrically operated latch operated by the key pad. A cartridge for the cards is formed of cardboard bent into a serpentine format to provide an upper compartment and a lower compartment, each compartment being suitable for holding up to four cards each. The internal surfaces of the cartridge are coated with a pyrotechnic material and a heating coil is connected to the cartridge. An authorized user of the device has a personal code which when inputted via the key pad opens the lid. Incorrect input of the code causes a piezoelectric bleeper to sound. Two incorrect input sequences are permitted but on the third incorrect sequence the coil causes the pyrotechnic solution on the cartridge to heat up and destroy the cards within the device.