Abstract: An electronic signature technology for attaching an electronic signature to an electronic file containing a document having a structure is provided, wherein a level of electronic file equivalence, a level of document structure equivalence and a level of document structure partial equivalence can be set and evaluated. A target document is analyzed to generate a representation having a structure. Next, a signature is generated from each of structural elements of the structure of the generated representation, and the generated signatures (ciphers) are concatenated into a single signature corresponding to the structure of the generated representation. Also, the electronic file having the generated electronic signature is verified to find from the contents of the signatures, at least (1) electronic file equivalence; (2) document structure equivalence; and (3) a coincidence rate, depending on a processing request.

Abstract: A three-dimensional graph display apparatus is provided for dynamically changing a display format for a three-dimensional graph. In a simulator of a three-dimensional object shape model wherein a three-dimensional object shape model is comprised of two objects, i.e., an object which has data related to properties of a target three-dimensional object (referred to as the “model object”) and an object having data required to display the object (referred to as the “display object”); data of a plurality of model objects can be linked to one another; and the model object can be shared by a plurality of display objects, three-dimensional point data saved in a database is retrieved and the retrieved three-dimensional point data is converted to three-dimensional objects and an object (container object) having the three-dimensional objects representing the three-dimensional point data as slot values in its model object is provided.

Abstract: A three-dimensional object shape model simulator system is provided. The system represents three-dimensional object shape models in such a form as to allow the models to be reused and efficiently managed in a database to implement flexible simulations.

Abstract: A data processing device making a plurality of desktops which can be used without switching and simultaneously is disclosed, comprising: a first processing portion which manages windows generated on a screen, as a processing portion managing an operation environment; a second processing portion which manages the screen other than the windows, as a processing portion managing operation environments; an event managing portion which determines whether an event caused by an operation applied to the screen is for a first operation environment or a second operation environment, and the second processing portion including means for outputting to the first processing portion a request for generating a window of the second operation environment as processing of the event which is determined to be for the second operation environment by the event managing portion, and the first processing portion including means for generating and controlling a window of the first operation environment as processing of the event which