Patent ID: 7389267

Claim:
A computer based verification method comprising: creating multiple sets of unique account data on an administrator system and transmitting electronically the unique account data to a buyer system and a seller system prior to each transaction; storing a buyer account number and the unique account data on the buyer system; storing a seller account number and the unique account data on the seller system; determining a transaction amount; determining a transaction time; generating a first set of sample data from the data stored on the buyer system based on the determined transaction time and the account numbers associated with the account data previously stored on the buyer and seller systems; generating a second set of sample data from the data previously stored on the seller system based on the determined transaction time and the account numbers associated with the account data previously stored on the buyer and seller systems; creating a matrix unique to a single transaction based on a first set of sample data from the buyer and a second set of sample data from the seller; selecting two digits from a combination of the buyers account number and the sellers account number based on a random number generated from the transaction time such that the first digit is stored as the x value and the second digit as the y value; scrambling the matrix based on the stored x and y values; selecting at least one row of data from the buyer and the seller; and sending both the buyers and the sellers row to an administrator when the buyers row matches the sellers row; retrieving at an administrators system created multiple sets of unique account data sent to the user, the sent sellers row of data, and the sent buyers row of data; unscrambling the sent data based on the random number used to scramble the matrix; comparing the created multiple sets of unique data with the unscrambled data retrieved from the buyer and the seller; and completing the transaction, when the unique data comparisons are positive.