Information processing apparatus, control method therefor and computer-readable storage medium

1. An information processing apparatus comprising:

a decrypting part configured to receive decrypting key information from a managing apparatus which manages the decrypting key information for decrypting information, to decrypt said information;

a monitoring part configured to communicate with the managing apparatus after the decryption until said information is encrypted again; and

a terminating part configured to terminate processing carried out on said information when the monitoring part does not receive a predetermined response from the managing apparatus,

wherein the monitoring part periodically makes an access to the managing apparatus to request the predetermined response when said information is stored in a predetermined folder after said information is decrypted.

2. The information processing apparatus as claimed in claim 1 , wherein the information processing apparatus is coupled to the managing apparatus via a predetermined communication network.

3. The information processing apparatus as claimed in claim 1 , further comprising:

a deleting part configured to delete the decrypted information when the terminating part terminates the processing carried out on said information.

4. The information processing apparatus as claimed in claim 3 , further comprising:

an application program configured to process an information file of said information; and

an operating system configured to provide functions of the terminating part and the deleting part.

5. The information processing apparatus as claimed in claim 1 , further comprising:

a re-encrypting part configured to re-encrypt said information, when the terminating part terminates the processing carried out on said information.

6. An information processing apparatus comprising:

a managing part configured to manage decrypting key information for decrypting encrypted information in order to enable processing of said information;

a transmitting part configured to transmit the decrypting key information in response to a request from a decrypting part configured to decrypt said information; and

a responding part configured to receive an access from the decrypting part and return a predetermined response thereto until said information is again encrypted,

wherein the responding part periodically receives the access requesting the predetermined response when said information is stored in a predetermined folder after said information is decrypted.

7. The information processing apparatus as claimed in claim 6 , wherein the information processing apparatus is coupled to the decrypting part via a predetermined communication network.

8. A control method for an information processing apparatus, comprising:

receiving decrypting key information from a managing apparatus which manages the decrypting key information for decrypting information, to decrypt said information;

communicating with the managing apparatus after said information is decrypted until said information is encrypted again; and

terminating processing carried out on said information when a predetermined response is not received from the managing apparatus in said communicating,

wherein the communicating periodically makes an access to the managing apparatus to request the predetermined response when said information is stored in a predetermined folder after said information is decrypted.

9. The control method for the information processing apparatus as claimed in claim 8 , wherein the information processing apparatus is coupled to the managing apparatus via a predetermined communication network.

10. The control method for the information processing apparatus as claimed in claim 8 , further comprising:

deleting the decrypted information when the processing carried out on said information is terminated in said terminating.

11. The control method for the information processing apparatus as claimed in claim 10 , further comprising:

processing an information file of said information by an application program installed in the information processing apparatus; and

providing functions of the terminating and the deleting by an operating system installed in the information processing apparatus.

12. The control method for the information processing apparatus as claimed in claim 8 , further comprising:

re-encrypting said information when the processing carried out on said information is terminated in said terminating.

13. A non-transitory computer-readable recording medium which stores a program which, when executed by a computer, causes the computer to perform a process comprising:

a decrypting procedure causing the computer to receive decrypting key information from a managing apparatus which manages the decrypting key information for decrypting information and decrypt said information;

a monitoring procedure causing the computer to communicate with the managing apparatus after said information is decrypted until said information is encrypted again; and

a generating procedure causing the computer to generate an instruction in order to terminate processing carried out on said information when a predetermined response is not received from the managing apparatus in said monitoring procedure,

wherein the monitoring procedure periodically makes an access to the managing apparatus to request the predetermined response when said information is stored in a predetermined folder after said information is decrypted.

14. The non-transitory computer-readable recording medium as claimed in claim 13 , wherein the computer is coupled to the managing apparatus via a predetermined communication network.

15. The non-transitory computer-readable recording medium as claimed in claim 13 , wherein the process further comprises:

a deleting procedure causing the computer to generate an instruction to delete the decrypted information when the processing carried out on said information is terminated in said generating procedure.

16. The non-transitory computer-readable recording medium as claimed in claim 15 , which further stores:

an application program configured to process an information file of said information; and

an operating system providing functions of the terminating procedure and the deleting procedure.

17. The non-transitory computer-readable recording medium as claimed in claim 13 , further comprising:

a re-encrypting procedure causing the computer to re-encrypt said information when the processing carried out on said information is terminated in said generating procedure.