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System for managing license for protecting content, server for issuing license for protecting content, and terminal for using content protected by license
System for managing license for protecting content, server for issuing license for protecting content, and terminal for using content protected by license
A license server 1 comprises: a license table for managing licenses purchased by users; a communication control section 20 for transmitting/receiving data through a communications network 3; an authentication control section 22 for performs authentication processing for a terminal 2; an encryption/decryption control section 21 for encrypting/decrypting communications with the terminal 2; an issued temporary license information table 13 for storing information on issued temporary licenses; and a return control section 24 for returning a temporary license and then deleting the information on the temporary license stored in the issued temporary license information table 13. 展开▼