Abstract: In the conventional method of maintaining the confidential a program, wherein a program to be executed in an information processing device is stored in a hard disk, etc., in an encrypted state and the program is decrypted when it is executed, because a decrypted program is written in memory, the program may be illicitly analyzed by a third person. Provided is memory management method wherein code information or data of a program written in a virtual memory is data which is encrypted and inaccessible by a CPU, and when code fetching or data access to the encrypted area occurs, an interruption process is performed wherein with respect to a management unit of the memory management device including the area, an inaccessible state is changed to an accessible state to perform decryption.

Abstract: In the conventional method of maintaining the confidential a program, wherein a program to be executed in an information processing device is stored in a hard disk, etc., in an encrypted state and the program is decrypted when it is executed, because a decrypted program is written in memory, the program may be illicitly analyzed by a third person. Provided is memory management method wherein code information or data of a program written in a virtual memory is data which is encrypted and inaccessible by a CPU, and when code fetching or data access to the encrypted area occurs, an interruption process is performed wherein with respect to a management unit of the memory management device including the area, an inaccessible state is changed to an accessible state to perform decryption.

Abstract: A method of manufacturing a polymer optical waveguide which is capable of efficiently manufacturing a polymer optical waveguide with a low optical loss by using a photosensitive resin of the type hardenable by a photo-cationic polymerization reaction is provided. The polymer optical waveguide includes light-transmitting cores, an under cladding layer provided under the cores, and an over cladding layer provided to cover the cores. The method includes applying a core-forming photo-cationic polymerizable resin composition containing a solvent to the surface of the under cladding layer volatilizing the solvent in a layer of the core-forming resin composition (2?) by a heating treatment; adjusting a residual solvent concentration in the core-forming resin composition after the heating step to 1 wt % or less.