An attacker duplicates the data on a Magnetic strip card (i.e. 'swipe
						card' or ‘magstripe’) to gain unauthorized access to a physical location or
						a person's private information. Magstripe cards encode data on a band of
						iron-based magnetic particles arrayed in a stripe along a rectangular card.
						Most magstripe card data formats conform to ISO standards 7810, 7811, 7813,
						8583, and 4909. The primary advantage of magstripe technology is ease of
						enconding and portability, but this also renders magnetic strip cards
						susceptible to unauthorized duplication. If magstripe cards are used for
						access control, all an attacker need do is obtain a valid card long enough
						to make a copy of the card and then return the card to its location (i.e. a
						co-worker’s desk). Magstripe reader/writers are widely available as well as
						software for analyzing data encoded on the cards. By swiping a valid card,
						it becomes trivial to make any number of duplicates that function as the
						original.