Patent ID: 6131718
Filing Date: 2000-10-17
Classification: G07D

Abstract:
A system for detecting counterfeit currency, comprising:a currency scanning terminal for reading and writing security data on a currency bill;a programmable security computer;a data store accessible by said security computer, said data store having stored therein a plurality of security data corresponding to a plurality of currency bills;first communication means in said currency scanning terminal for communicating with said security computer;second communication means in said security computer for communicating with said currency scanning terminal;authorization request means in said currency scanning terminal responsive to a currency bill being scanned for reading said currency bill's security data and transmitting said security data to said security computer;comparison means in said security computer responsive to receiving said security data transmitted by said currency scanning terminal for comparing said security data with said security data in said data store and generating a comparison result;first validation means in said security computer responsive to said comparison result being true for calculating updated security data for said currency bill, storing said updated security data in said data store, and transmitting said updated security data to said currency scanning terminal;first rejection means in said security computer responsive to said comparison result being false for invalidating said currency bill in said data store and transmitting a rejection code to said currency scanning terminal;second validation means in said currency scanning terminal responsive to receiving said updated security data from said security computer for writing said currency bill with said updated security data and generating a validation message signifying that said currency bill is authentic; andsecond rejection means in said currency scanning terminal responsive to receiving said rejection code from said security computer for writing said currency bill with said rejection code and generating a rejection message signifying that said currency bill is not authentic.