Patent ID: 7747872

Claim:
A security validation system adapted to employ a PC comprising: a hand held electronic reference product, an encrypted database file and a file system on said hand held electronic reference product, a reader application adapted for installation on the PC, a serial identification number for one of said hand held product and said file system, a first voucher in said database file, said first voucher based on said serial identification number, and a second voucher in said product at a location outside of said database file, said second voucher based on said serial identification number, a comparator program within said PC reader to read and compare said first and second vouchers to provide a validation signal if said vouchers meet a predetermined correspondence comparison criterion, said validation signal permitting decryption by the PC of said database file wherein said database file is accessed using said file system of the hand held electronic reference product, precluding use of the file system on the PC, said database file being accessed while said hand held electronic reference product is connected to said PC and thereby said file system of said hand held electronic reference product maintaining control over the transmission of said database file.