Patent ID: 7143062

Claim:
A computer program product for use in conjunction with a commodity-based system for conducting financial transactions, the system including at least one deposit site having secure facilities for storage of a quantity of fungible precious metal, said computer program product embodied on computer-readable medium and comprising code that, when executed on a computer, causes the computer to perform the following steps: create an electronic data file having a unique serial number associated therewith, and store said electronic data file as one of a plurality of electronic data files; identify an amount of the fungible precious metal represented by said electronic data file and store the identified amount as part of said electronic data file, the identified amount being no greater than a deposit of the fungible precious metal having been previously received at the secure facilities, whereby a total amount of fungible precious metal represented by the plurality of electronic data files is no greater than the quantity of fungible precious metal stored in the secure facilities; identify a date associated with said electronic data file, said date indicating the date when said electronic data file was crated, and store the date as part of said electronic data file; create a digital signature for authenticating said electronic data file, and store the digital signal as part of said electronic data file.