METHOD FOR PREPARING ELECTRONIC INFORMAL SEAL, ELECTRONIC INFORMAL SEAL AFFIXING SYSTEM AND ELECTRONIC DOCUMENT ALTERATION CHECKING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an electronic informal seal preparing method for preparing an electronic informal seal by a text without using image information, an electronic informal seal affixing system capable of affixing the prepared electronic informal seal to an optical position in an electronic document or the like and storing the affixed electronic document as a file so as to redisplay it without requiring another file, and an alteration checking system for executing alteration check whether the electronic document has been altered or not.;SOLUTION: Character information such as a name and a section to be displayed in an information seal and the frame information (the diameter of a circle of an outer frame, a style, etc.), of an outer frame and a partition line are prepared by a text as informal seal information and stored in an informal seal data base 105. In the case of affixing a seal, a personal ID password is inputted, required informal seal information is extracted from the data base 105, a prescribed outer frame circle and a partition straight line are drawn based on the frame information by a seal image compositing part 206, the character information is inserted into the drawn image to composite a seal image, and the composited seal image is affixed to the document.;COPYRIGHT: (C)2000,JPO