Description

An adversary analyzes the data on two or more magnetic strip cards and is able to generate new cards containing valid sequences that allow unauthorized access and/or impersonation of individuals.

Prerequisites

The ability to calculate a card checksum and write out a valid checksum value. Some cards are protected by a checksum calculation, therefore it is necessary to determine what algorithm is being used to calculate the checksum and to employ that algorithm to calculate and write a new valid checksum for the card being created.