Printing device for printing conceal pattern on character string printed on printed object based on said character string, and printing method and recording medium for the same

Abstract

The printing device includes a reading unit, a printing unit, an operation mode setting unit, a personal information determining unit that determines the kind of the personal information, such as an address, a personal name, or a telephone number, from image data read by the reading unit when the operation mode setting unit sets the operation mode to be a reading mode, a printing data setting unit, a concealing-pattern-data generating unit that generates concealing pattern data, and a printing control unit that activates the printing unit to perform printing on the printed object based on the concealing pattern data generated by the concealing-pattern-data generating unit when the operation mode setting unit sets the operation mode to be a printing mode.