Abstract: A data management system with which secret data is hardly leaked to a third party. A communication terminal of the present invention generates an encryption key and a data ID using a terminal identification ID of the communication terminal, encrypts the secret data using the encryption key, and causes a data management server to associate the secret data encrypted through this encryption with the data ID and to store the associated data and ID. In addition, the communication terminal of the present invention generates again the encryption key and the data ID using the terminal identification ID internally stored in the communication terminal, requests the secret data corresponding to the data ID from the management server, and decrypts the received secret data using the encryption key.

Abstract: A system which converts a first Web display program designed for a first communication terminal apparatus to a second Web display program for a second communication terminal apparatus. The system of the present invention stores a segment list created by dividing the first Web display program into segments, assigning identification information to tags contained in the segments, and listing the identification information, stores a conversion condition created for the segments for changing a display setting described in the first Web display program to a display setting of the second Web display program, and stores a conversion program for causing a conversion process for converting the first Web display program to the second Web display program to be executed using he segment list and the conversion condition. According to a preferred embodiment of the present invention, the conversion process is executed by the second communication terminal apparatus.

Abstract: A system which converts a first Web display program designed for a first communication terminal apparatus to a second Web display program for a second communication terminal apparatus. The system of the present invention stores a segment list created by dividing the first Web display program into segments, assigning identification information to tags contained in the segments, and listing the identification information, stores a conversion condition created for the segments for changing a display setting described in the first Web display program to a display setting of the second Web display program, and stores a conversion program for causing a conversion process for converting the first Web display program to the second Web display program to be executed using the segment list and the conversion condition. According to a preferred embodiment of the present invention, the conversion process is executed by the second communication terminal apparatus.