Patent application number | Description | Published |
20090252324 | METHOD AND APPARATUS FOR PROVIDING BROADCAST SERVICE USING ENCRYPTION KEY IN A COMMUNICATION SYSTEM - A method and apparatus for providing a broadcast service in a communication system is provided. The method includes creating a seed key pair including a first key and a second key, transmitting the seed key pair to a terminal to which the broadcast service is to be provided, creating a certain number of encryption keys using the seed key pair, the certain number corresponding to a lifetime of the seed key pair, encrypting broadcast service data for the lifetime using the encryption keys, and broadcasting the encrypted broadcast service data. | 10-08-2009 |
20090254983 | METHOD AND APPARATUS FOR MANAGING TOKENS FOR DIGITAL RIGHTS MANAGEMENT - A method and apparatus for managing tokens for Digital Rights Management (DRM) in a terminal are provided. In the method, at least one token is acquired from a Rights Issuer (RI), and the token is moved to a Secure Removable Media (SRM) through a token move request message. The token can be shared by several terminals. | 10-08-2009 |
20110203002 | METHOD FOR PROTECTING PERSONAL INFORMATION IN AUDIENCE MEASUREMENT OF DIGITAL BROADCASTING SYSTEM - A method for protecting personal information in Audience Measurement (AM) of a digital broadcasting system is provided, including inserting an indicator, which notifies whether a consumption pattern of a service or content provided by a service provider can be measured, into a service guide, to which the information of the service or content is provided by a service provider; and determining whether the AM can be executed for the service or content in accordance with the indicator when the AM function is implemented in a terminal. | 08-18-2011 |
20110225422 | METHOD AND APPARATUS FOR REPORTING AUDIENCE MEASUREMENT IN CONTENT TRANSMISSION SYSTEM - A method and apparatus for reporting a consumption time of a service or content in Audience Measurement (AM), which measures a user consumption pattern of the service or the content is provided. A method for reporting a consumption time of the service or the content in a terminal of a content transmission system includes receiving an encryption key for encrypting the service or the content from a broadcasting server and transmitting a message requesting interpretation of the encryption key to a smart card. The message includes consumption time information of the service or the content. | 09-15-2011 |
20110231567 | METHOD AND APPARATUS FOR CONTROLLING CONTENT PLAYBACK IN CONTENT DELIVERY SYSTEM - A method is provided for controlling content playback by a terminal in a content delivery system. The method includes receiving streaming content from a service provider, the streaming content including zone information of each zone and an associated identifier of each zone for identifying a terminal's operation mode, determining the terminal's operation mode depending on the identifier, and controlling playback of the streaming content in a zone corresponding to the zone information according to the determined operation mode. | 09-22-2011 |
20120023594 | METHOD AND APPARATUS FOR MANAGING CONSUMPTION RIGHT FOR MULTIMEDIA SERVICE - Disclosed is a method and an apparatus for managing a consumption right for each stage for a service including a plurality of stages or episodes. The right issuer includes the access condition, which allows an access to the Right Object (RO) for each stage, in the right object representing the consumption right for the stepped multimedia service and then transfers the right object to the device. When the stepped multimedia service is executed, the device obtains the access information satisfying the access condition corresponding to a corresponding stage from the right issuer or a service provider and then transfers the access information to the RO, allowing a user to access the RO and execute a service of the corresponding stage by using the RO. | 01-26-2012 |
20120284797 | DRM SERVICE PROVIDING METHOD, APPARATUS AND DRM SERVICE RECEIVING METHOD IN USER TERMINAL - Disclosed is a DRM Proxy Server Agent (DRM PSA), which converts a format of a DRM system into a format recognizable in a user terminal when the user terminal and a service provider do not use the same type of DRM system. The user terminal downloads the DRM PSA from the service provider and installs the DRM PSA in the user terminal. Through the download and installation of the DRM PSA, the user terminal can use various DRM systems provided by the service provider regardless of the type of DRM system installed in the user terminal. | 11-08-2012 |
20120291142 | METHOD AND APPARATUS FOR PROVIDING DRM SERVICE - Methods and apparatus are provided for providing a DRM service by a user terminal apparatus consuming DRM content in a service environment that provides the DRM content using a plurality of incompatible DRM systems. A license corresponding to the DRM content is acquired from a service providing apparatus that provides the DRM content. It is determined whether the license is a common license having a common DRM interface format. The common DRM interface format of the common license is converted to a format of a first DRM system installed in the user terminal apparatus, when the license is the common license. The license having the format of the first DRM system is applied in reproducing the DRM content. The common license is provided from the service providing apparatus to the user terminal apparatus through a common DRM interface when the service providing apparatus does not support the first DRM system. | 11-15-2012 |
20130024701 | METHOD AND SYSTEM FOR MANAGING AN ENCRYPTION KEY FOR A BROADCASTING SERVICE - A system and method for managing an encryption key are provided, which include receiving, from a DRM agent, an RO request message for receiving content; generating a KSP including a first key and a second key; applying hash chains with different directions to the first key and to the second key to generate an encryption key for the content; and transmitting, to the DRM agent, a response message including a context element having an identifier of the content and a key information element. The key information element includes a first encryption key element; a rights encryption key information element; and an encryption data element. | 01-24-2013 |
20130024890 | APPARATUS AND METHOD FOR THE COMPULSORY VIEWING OF ADVERTISEMENTS - An apparatus and method for the compulsory viewing of advertisements in conjunction with a DRM technique for protecting a multimedia service by obligating a user to view advertisements on the device of the user includes, upon receipt of a request for the provision of content, determining whether or not information on compulsory advertisement viewing is included in a rights object for the requested content, if information on compulsory advertisement viewing is included, detecting the advertisement relevant to the requested content, playing the detected advertisement for a predetermined compulsory playback time, and providing the requested content upon the completion of the playback of the advertisement. | 01-24-2013 |
20130030906 | METHOD AND APPARATUS FOR PROVIDING A SERVICE IN ACCORDANCE WITH THE VIEWING OF AN ADVERTISEMENT USING DRM - Methods and apparatus for providing a multimedia service are provided. A first request message is transmitted from the device to a rights issuer requesting a first right object required to execute an advertisement. A first request response message having the first right object is transmitted from the rights issuer to the device. The advertisement is executed at the device using the first right object. A report message having an advertisement consumption specification is transmitted from the device based on execution of the advertisement. A report response message having an advertisement consumption certificate is received at the device. A second request message is transmitted from the device to the rights issuer requesting a second right object required to execute the content. A second request response message having the second right object is transmitted from the rights issuer to the device, when the second request message includes the advertisement consumption certificate. | 01-31-2013 |
20130101118 | METHOD AND APPARATUS FOR PROVIDING BROADCAST SERVICE USING ENCRYPTION KEY IN A COMMUNICATION SYSTEM - A method and apparatus for providing a broadcast service in a communication system is provided. The method includes generating a key pair comprising a first key and a second key, generating at least one of forward encryption keys by applying a forward hash chain to the first key, generating at least one of reverse encryption keys by applying a reverse hash chain to the second key, generating at least one of encryption keys using the at least one of forward encryption keys and the at least one of reverse encryption keys, encrypting broadcast service data using the at least one of encryption keys, and broadcasting the encrypted broadcast service data. | 04-25-2013 |
20130108043 | METHOD AND APPARATUS FOR PROVIDING BROADCAST SERVICE USING ENCRYPTION KEY IN A COMMUNICATION SYSTEM | 05-02-2013 |
Patent application number | Description | Published |
20110096929 | ENCRYPTION KEY DISTRIBUTION METHOD IN MOBILE BROADCASTING SYSTEM, AND SYSTEM FOR THE SAME - An encryption key distribution method for service and content protection in a mobile broadcasting system, and a system for the same which includes generating, by a network, a first encryption key when the broadcast service is first provided; transmitting a generalized rights object message, which includes identification information for identifying the generated first encryption key, to the terminal; generating a second encryption key before the lifetime of the first encryption key expires; and transmitting the generalized rights object message, which includes identification information for identifying the generated second encryption key, to the terminal. | 04-28-2011 |
20110206205 | ENCRYPTION KEY DISTRIBUTION METHOD IN MOBILE BROADCASTING SYSTEM AND SYSTEM FOR THE SAME - A method and a system for distributing an encryption key for service protection and content protection in a mobile broadcasting system are provided where a network generates a first encryption key when a broadcasting service is first provided to the terminal, and transmits a long term key message including the generated first encryption key to the terminal. Also, the network generates a second encryption key before the life-time of a first access value pair expires, and transmits a long term key message including the generated second encryption key to the terminal. | 08-25-2011 |
20130160135 | METHOD AND APPARATUS FOR PERFORMING DOWNLOADABLE DIGITAL RIGHTS MANAGEMENT FOR A CONTENT SERVICE - A method and system are provided for performing downloadable Digital Rights Management (DRM) for a content service. The method includes receiving, from a service provider, a Content Access Token (CAT) issuance request for specific content, wherein the CAT issuance request includes information about devices mapped to account information of a user that has purchased the specific content; issuing a CAT; and delivering the CAT to the devices mapped to the account information. | 06-20-2013 |
20130167253 | METHOD AND APPARATUS FOR PROVIDING CLOUD-BASED DIGITAL RIGHTS MANAGEMENT SERVICE AND SYSTEM THEREOF - A method for providing a Digital Rights Management (DRM) service in a network is provided. The method includes receiving a request message for device registration, which includes DRM-related identification information, from a user device; and registering registration information of the user device, which is distinguished according to a corresponding user account and according to a corresponding DRM solution, based on the DRM-related identification information. | 06-27-2013 |
20130219510 | DRM/CAS SERVICE DEVICE AND METHOD USING SECURITY CONTEXT - A DRM/CAS service device is provided. The device includes a registration service server that authenticates a device and an STP of the device and generates a device-based context according to a registration request and a DRM/CAS service request from the device; a DRM/CAS service server that receives the device-based context and generates DRM/CAS security contexts; and a DRM/CAS SW service server that receives the DRM/CAS security contexts, generates the DRM/CAS software package including the DRM/CAS security contexts and DRM/CAS software, and enables the DRM/CAS software package to be provided for the device. The DRM/CAS service device reduces the amount of processing and simplifies the process by installing and using content and service protection software, that is, DRM/CAS software by using a security context. | 08-22-2013 |
20140157438 | USER DEVICE AND METHOD FOR RECEIVING DRM FUNCTION CORRESPONDING TO SPECIFIC CONTENTS - The present invention proposes a method for obtaining a digital right management (DRM) function for playing DRM contents on a user device according to need. To this end, the present invention comprises the steps of, when a user device requests a specific DRM contents or accesses a service system, a user device obtaining a rights object corresponding to a request; determining information on a current DRM function using the rights object; and when a new DRM function is required, installing a new DRM function or upgrading the standard DRM function. | 06-05-2014 |