Patent ID: 9020855
Filing Date: 2015-04-28
Classification: G06F,G06Q,G11B,H04N

Abstract:
1. A system including a portable communication terminal and a recording/reproducing device, wherein the portable communication terminal comprises: a processor; and a non-transitory memory unit storing therein a program that when executed by the processor causes the processor to perform steps of: (i) transmitting, to a server, license acquisition information recorded on a portable recording medium; (ii) reading encrypted license information and the license management information from the portable recording medium; and (iii) receiving, from the server, encrypted license information and license management information corresponding thereto and recording the encrypted license information and the license management information onto the portable recording medium, the recording/reproducing device comprises: a processor; and a non-transitory memory unit storing therein a program that when executed by the processor causes the processor to perform steps of: acquiring the encrypted license information and the license management information, wherein license management information includes content information and operation type information; decrypting the encrypted license information and obtaining license information in plain text, wherein the license information includes content information and operation type information; executing authentication by comparing the license management information and the license information, wherein the authentication further comprises: judging a consistency between (i) the content information and the operation type information that are included in the license management information and (ii) the content information and the operation type information that are included in the license information; and executing an operation for content, based on the license information in plain text, wherein the execution of the operation is performed only when a consistency between the license information and the license management information is certified by a comparison result of the authentication, wherein the license information is any one of (i) license information for a device to use the content, (ii) license information for a user to use the content, and (iii) license information for an organization to use the content, wherein the acquiring of the encrypted license information and license management information further comprises: receiving a specification of a usage range of the content, the usage range being (i) unique to the device, (ii) unique to the user, or (iii) unique to the organization, generating license acquisition information for acquiring license information corresponding to the usage range; and recording the license acquisition information onto the portable recording medium and passing the license acquisition information on the portable recording medium to the portable communication terminal, wherein the decryption of the encrypted license information is performed by selecting and using, as an encryption key, an identifier that corresponds to the license management information, the identifier being selected from among an identifier unique to the device, an identifier unique to the user, and an identifier unique to the organization.