Patent ID: 7762456

Claim:
A method for restricting access to a data portion stored on a security clearance card, the method comprising: reading data portions from at least one security clearance card, wherein each security clearance card has data portions including at least a first data portion and a second data portion, and wherein the first data portion is encrypted using a first encryption key, and the second data portion is encrypted using a second encryption key; associating a first computing system with a first security clearance value indicative of data portions the first computing system is authorized to access on the at least one security clearance card, wherein the first computing system has a first security key corresponding to the first encryption key; associating a second computing system with a second security clearance value indicative of data portions the second computing system is authorized to access on the at least one security clearance card, wherein the second computing system has a second security key corresponding to the second encryption key; altering the first security clearance value, wherein the data portions accessible by the first computing system are changed; at the first computing system, attempting to decode the data portions via the first security key, wherein the first computing system decodes the first data portion; and at the second computing system, attempting to decode the data portions via the second security key, wherein the second computing system decodes the second data portion.