Program execution control device, OS, client terminal, server, program execution control system, program execution control method and computer program execution control program

A program execution control method adapted to authorize execution of a program specified in advance;

• said method comprising:
• a step of storing at least a set of an expected value obtained by. applying a predetermined function to said program specified in advance and an identifier of said specified program;
• a step of externally inputting at least a set of an input program and the identifier of the input program;
• a step of acquiring a computed value by applying a predetermined function to said input program;
• a step of comparing the expected value corresponding to the identifier of said input program and said computed value acquired in said function operating step out of sets of expected values and identifiers;
• and
• a step of externally outputting said input program in response to agreement of said compared two values.

A program execution control program readably stored in a storage device by means of a computer in order to cause a computer to execute only a program specified in advance, said program comprising:

• a step of storing at least a set of an expected value obtained by applying a predetermined function to said program specified in advance and an identifier of said specified program;
• a step of externally inputting a set of an input program and the identifier of the. input program;
• a step of acquiring a computed value by applying a predetermined function to said input program;
• a step of comparing the expected value corresponding to the identifier of said input program and said computed value acquired in said function operating step out of sets of expected values and identifiers;
• and
• a step of externally outputting said input program in response to agreement of said compared two values.

A program execution control device adapted to authorize execution of a program specified in advance;

• said device comprising:
• an expected value table storage section that stores at least a set of an expected value obtained by applying a predetermined function to said program specified in advance and an identifier of said specified program;
• a decoding key storage section that stores a decryption key input in advance;
• an input interface that allows an encrypted program, said program having encrypted a set of an input program and the identifier of the input program, to be input externally;
• a decrypting section that decrypts said encrypted program by means of said decryption key and generating the decrypted program and the identifier of the decrypted program;
• a function operating section that acquires a computed value by applying a predetermined function to said decrypted program;
• a comparing section that compares the expected value corresponding to the identifier of said decrypted program out of the expected values in said expected value table and said computed value acquired by the function operating section;
• and
• an output interface that externally outputs said decrypted program in response to agreement of said compared two values.

A program execution control method adapted to authorize execution of a program specified in advance;

• said method comprising:
• a step of storing at least a set of an expected value obtained by applying a predetermined function to said program specified in advance and the identifier of said specified program;
• a step of storing a decryption key input in advance;
• a step of externally inputting an encrypted program, said program having encrypted a set of an input program and the identifier of the input program;
• a step of decrypting said encrypted program by means of said decryption key and generating the decrypted program and the identifier of the decrypted program;
• a step of acquiring a computed value by applying a predetermined function to said decrypted program;
• a step of comparing the expected value corresponding to the identifier of said decrypted program and said computed value acquired in the function operating step out the sets of expected values and identifiers;
• and
• a step of externally outputting said decrypted program in response to agreement of said compared two values.

A program execution control program readably stored in a storage device by means of a computer in order to cause a computer to execute only a program specified in advance, said program comprising:

• a step of storing at least a set of an expected value obtained by applying a predetermined function to said program specified in advance and an identifier of said specified program;
• a step of storing a decryption key input in advance;
• a step of externally inputting an encrypted program, said program having encrypted a set of an input program and the identifier of the input program;
• a step of decrypting said encrypted program by means of said decryption key and generating the decrypted program and the identifier of the decrypted program;
• a step of acquiring a computed value by applying a predetermined function to said decrypted program;
• a step of comparing the expected value corresponding to the identifier of said decrypted program and said computed value acquired in the function operating step out the sets of expected values and identifiers;
• and
• a step of externally outputting said decrypted program in response to agreement of said compared two values.