Patent ID: 7137553

Claim:
A security system comprising: a security clearance card having at least two data portions stored thereon, wherein each data portion is encrypted differently using a different encryption key; at least one card reader element capable of reading the data portions from said security clearance card; at least one computing system in communication with said card reader, said computing system having an associated security level indicating what data portions the computing system is authorized to access, said computing system having at least one associated security key for decoding data portions from said security clearance card, wherein when said reader reads the data portions from said security clearance card, said computing system attempts to decode the at least two data portions using the security key, wherein data portions that were encrypted with the security key associated with computing system are decoded and read by the computing system, while data portions encrypted using another security key not accessible by the computing system are not decoded by said computing system thereby restricting access by said computing system to some data portions read from said security clearance card.