Abstract: An information processing device 100 has a receive part 60 that receives information from user terminal 200; a transmit part 70 that transmits information to the user terminal 200; an identification-determination part 10 that identifies a user based on information from the user terminal 200 and determines whether a file, which is target, is readable; and a decryption part 30 that decrypts the file, which is encrypted, in a case where it is determined by the identification-determination part 10 that the file is readable by the user.

Abstract: An information processing device 10 includes: a database 12 that stores contents created by an administrator terminal 13; and a control device 11 that stores the contents and the administrator terminal 13 that are associated with each other as association information, and executes setting an access right to the contents on the basis of this association information.

Abstract: An information processing device 10 comprising: an access log collection unit 14 that collects access logs when a client terminal 11 requests a content from a web server 12; a database 16 in which a malicious URL is registered in advance; and a falsification detection unit 19 that collates a connection destination URL with the database 16 and detects falsification of the content if the connection destination URL corresponding to a connection destination of the client terminal 11 matches the malicious URL.

Abstract: A isotopic gas of high purity is obtained at low cost, wherein for example, in a case of separating 13CH4 from methane gas and obtaining 13CH4 of high purity, the enrichment of 13CH4, using the difference in adsorption of 12CH4 and 13CH4 onto an adsorbing material, is performed up to a certain concentration, and thereafter, 13CH4 is enriched by a separation method by distillation that uses the difference in boiling point.

Abstract: A system stores densely dissolved methane-base gas and supplies gas of a predetermined composition. A container (10) stores methane-base gas dissolved in hydrocarbon solvent and supplies it to means for adjusting composition, through which an object of regulated contents is obtained. Preferably, the means for adjusting composition is means for maintaining the tank in a supercritical state, or piping (48) for extracting substances at a predetermined ratio from the gas phase (12) and liquid phase (16) in the container.

Abstract: A system stores densely dissolved methane-base gas and supplies gas of a predetermined composition. A container (10) stores methane-base gas dissolved in hydrocarbon solvent and supplies it to means for adjusting composition, through which an object of regulated contents is obtained. Preferably, the means for adjusting composition is means for maintaining the tank in a supercritical state, or piping (48) for extracting substances at a predetermined ratio from the gas phase (12) and liquid phase (16) in the container.

Abstract: An apparatus for generating plasma of helium mainly-contained gas added with halogen element using high-frequency energy which is applied between concentrically-arranged electrodes to conduct an etching treatment on a substrate with the thus-generated plasma, is equipped with a grounded electrode on the surface of the substrate, the grounded electrode serving to prevent electrification or charging of the substrate. A cylindrical insulator is provided between the electrodes so as to be contacted with the outside electrode, and a voltage applied between the central electrode and the cylindrical insulator is heightened by reducing the thickness of the cylindrical insulator or increasing the dielectric constant of the cylindrical insulator, so that low-temperature plasma is generated under atmospheric pressure using argon mainly-contained gas in a reaction space.