Abstract: A security management program stored in a computer-readable recording medium causes a computer to perform the following steps (1) to (4). (1) A security manager authenticates an authentication target with a prepared authentication method in response to a login request from the authentication target. (2) An application execution unit outputs an authentication request in response to an application execution request which is output from the security manager after the authentication succeeds. (3) A database access unit authenticates the authentication target with the authentication method in response to the authentication request. (4) In response to a database access request from the application execution unit, the database access unit accesses a database in a portable terminal device depending on the authentication performed by the database access unit.

Abstract: A computer-readable recording medium containing an application management program for automatically performing version management to surely manage versions of a client application that communicates with a server application. A communication request monitor acquires a communication request issued from a terminal device to a server, and extracts version information of a client application from the communication request. An upgrade determination unit determines whether the extracted version information shows the latest version, and determines that upgrade is necessary if the version is not the latest version. A setting file transmitter sends the communication request to the server if the upgrade determination unit does not determine that the upgrade is necessary. If the upgrade is necessary, on the contrary, the setting file transmitter discards the communication request and sends the client application setting file for the latest version to the terminal device sending the communication request.

Abstract: A process, a device, and a computer-readable medium storing a program, for encryption. A conversion table having regions each of which stores 2i character codes associated with index values is provided, where i is a natural number predetermined for each region, the 2i character codes are defined in a predetermined character encoding scheme, and the index values have a minimum necessary bit length for uniquely identifying the 2i character codes within each region. First character codes constituting a plaintext are converted into index values by reference to respectively corresponding regions of the conversion table. Then, the index values are encrypted without changing the bit lengths, and the encrypted values are converted into second character codes associated with index values identical to the encrypted values by reference to the respectively corresponding regions of the conversion table, a sequence of the second character codes is outputted as an encrypted text.