Patent ID: 7581257

Claim:
A method for ensuring the security of a desired transaction over a computer network for a product being purchased by a buyer from a seller, comprising the steps of: a transaction acquirer computer system generating, in response to a transaction request from a buyer computer system of the buyer received through the computer network, a randomly generated once-only alphanumeric transaction identification number associated with the desired transaction, the transaction acquirer computer system storing the transaction identification number and information regarding the transaction request in a database stored in a storage unit associated with the transaction acquirer computer system, providing the transaction identification number to a seller computer system of the seller through the computer network, wherein, to complete the transaction, the seller provides the received transaction identification number to the transaction acquirer computer system, and the transaction acquirer computer system verifies the received transaction identification number by comparing the transaction identification number received from the seller with the transaction identification number stored in the database associated with the transaction acquirer computer system, and, if they match, provide instructions to facilitate access to the buyer account to settle the transaction and disabling the transaction identification number stored in the database, such that the transaction identification number cannot be used to conduct another transaction, thereby providing a secure transaction over the computer network.