Patent ID: 8138923

Claim:
A radio-frequency identification (RFID) tag security system, comprising: a plurality of security servers each coupled between respective RFID tag reader devices and respective back-end systems, wherein a back-end system is configures to read tag data from and to write tag data to one or more RFID reader devices; and at least one database coupled to each security server, wherein the database is configurable to store a plurality of policies, and wherein each security server is configurable to analyze tag data read from and written to a respective tag reader device according to one or more of the policies, wherein analyzing comprises, determining whether the tag data has been tampered with and whether a tag is an unauthorized duplicate of a genuine, original tag; generating a security stamp uniquely associated with the tag data; storing the security stamp on or more of one the tag and an external integrity database, wherein under predefined circumstances when the tag data has been tampered with, an exception causes an escalation of priority, the predefined circumstances comprising a signature reference indicating an attack signature; and determining whether there is a security stamp associated with the tag data: if there is a security stamp associated with the tag data, generating a second security stamp based on the tag data: and comparing the associated security stamp with the second security stamp to establish integrity of the associated tag data.