Patent ID: 8096466

Claim:
A system for recording a transaction relating to a security document, the security document having disposed thereon or therein coded data including a plurality of coded data portions, each coded data portion being indicative of at least an identity of the security document and part of a signature, the signature being a digital signature of at least part of the identity, the system including a computer system for: receiving indicating data from a sensing device, the sensing device being responsive to sensing of the coded data to generate indicating data at least partially indicative of: the identity of the security document; the part of the signature; and, the transaction; determining, from the indicating data, a determined identity and at least one determined signature part; authenticating the security document using the determined identity and the at least one determined signature part; and updating, using the received indicating data, transaction data stored in a data store, the transaction data being indicative of: the identity of the security document; and, the transaction.