LICENSE MANAGING DEVICE, ISSUING DEVICE AND METHOD, PROGRAM EXECUTING DEVICE AND METHOD, AND COMPUTER-READABLE MEDIUM

To allow a user to use only a certain function while using a library containing a plurality of functions, a license issuing means (11) issues a license file to an application program using a library containing a plurality of functions. The license file contains licensed function information for specifying a function allowed to be used among the plurality of functions contained in the library. An authentication means (12) performs license authentication based on the license file. A function activation means (13) activates a function specified by the licensed function information among the plurality of functions in the library based on a result of the license authentication. A program execution means (14) executes the application program by using the activated function.