Program installation method, program installation system, program executing apparatus, and storage medium

A program executing apparatus comprising;

• memory for storing installed programs;
• and
• a processor for executing said programs;
• wherein said processor receives a program's signature data, checks for interference with other already installed programs based on said signature data, and authorizes installation of programs with which there is no interference.

A program installation method comprising;

• a step of uploading at least a signature data of a program in response to a program request;
• a step of receiving the signature data of said program;
• a step of checking for interference with other already installed programs on the basis of said signature data;
• and
• a step of authorizing the installation of programs with which there is no interference.

A storage medium stored;

• a program for receiving signature data of a program;
• a program for checking for interference with other already installed programs on the basis of said signature data;
• and
• a program authorizing the installation of programs with which there is no interference.