Abstract: The invention relates to a system (100) for securing the transmission of biometric data over an insecure network (16). The system (100) includes a transaction terminal (18) having a user interface (28, 30), a biometric scanner (26), and a communication interface (24) for transmitting and receiving data to and from a processing unit (19) over the network (16). The terminal (18) has a unique serial number (400) and a unique private key. The system (100) includes a secure database (10), to which the processing unit (19) is connected, for storing personal identification information and biometric templates of users, and the serial number (400) and associated private key of the terminal (18). The terminal (18) receives identification information and biometric data via the user interface (28, 30) and scanner (26), and generates a unique transaction code (402).