Abstract: A system and method are provided for enabling and recording operations relating to computers and computer peripheral equipment wherein sensitive or secret data is to be entered and stored or processed and data of a similar nature is accessible from memory or calculating circuits. In particular, the invention involves electronic means for sensing or scanning one or more physical characteristics of a person or persons to enter and/or receive data from a computer and generating signals indicative of such physical characteristic(s) which signals are automatically analyzed and compared with signals for enabling the operation of the computer. In addition, a code signal or signals are generated which is used to identify the person entering and receiving data from the computer, which code signal is recorded for record purposes along with information indicative of the information entered and/or received from the computer.

Abstract: A document to be verified or tested as a possible counterfeit is scanned by a system that optically senses a specific target area or aperture on the document. This area may include material deposited on the document or may be simply the document material. A reference grid is imprinted on the document to locate the same target area to be sensed each time the document is scanned, independent of the transport used to do the scanning. The reference grid is used to locate the target area both vertically and horizontally and signals sensed from the target area are combined to a representative composite.

Abstract: An apparatus for discriminating specified sorts of printed matter is provided with a magnetic sensor reading an identification pattern that is printed on printed matter such as a bill, a check and the like using magnetic ink and outputting a pattern signal; a standard memory part storing a standard signal; and a comparison part comparing the above-mentioned pattern signal with the above-mentioned standard signal in their respective reference positions and also in a position where they are made to offset relatively from those reference positions; whereby the precision in identifying the printed matter is improved.