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Abstract

A system and method are provided for authenticating data transmission between a network-connected digital scanner and a terminal. The method comprises: scanning a document at a digital scanner; signing the scanned document with a private key of a first asymmetric key-pair to create a first signature; transmitting the scanned document and first signature to a network-connected terminal; and, at the terminal, using a public key of the first key-pair to authenticate the transmitted document. Typically, signing the scanned document with a private key of a first asymmetric key-pair to create a first signature includes: creating a one-way hash function of the scanned document; and, encrypting the one-way hash function with the private key. Then, using a public key of the first key-pair to authenticate the transmitted scanned document includes: creating a one-way hash function of the transmitted document; decrypting the transmitted first signature with the public key; and, comparing the one-way hash function of the transmitted document to the decrypted signature. Some aspects of the method include the further steps of: at the digital scanner, establishing a user identity test, for example a PIN number, associated with the terminal; and submitting proof of user identity when a document is to be transmitted. Then, the scanned document and signature are transmitted in response to passing the user identity test, for example inputting the PIN number.

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First Claim