Patents by Inventor Youn-Sung Chu

Youn-Sung Chu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7822425
    Abstract: A SUPL enabled terminal, method and system for processing SUPL are discussed. According to one embodiment, the SUPL enabled terminal includes a processor to process a SUPL location platform (SLP) mode indicator received in a SUPL initiation message, the SLP mode indicator indicating whether the terminal is to operate according to a proxy mode or a non-proxy mode.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: October 26, 2010
    Assignee: LG Electronics Inc.
    Inventors: Dong-Hee Shim, Youn-Sung Chu
  • Publication number: 20100205439
    Abstract: Disclosed is a method of receiving by a terminal a rights object (RO) from a rights issuer (RI) on behalf of a memory card, the method including, receiving, by the terminal, a trigger message for RO acquisition from the rights issuing server, comparing, by the terminal, trust anchor and ID of the memory card in a list included in the trigger message with a trust anchor and ID of the memory card within a context of the terminal, transmitting, by the terminal, a RO request message to the rights issuing server if the trust anchor and the ID of the memory card within the context are consistent with those within the list according to the comparison result, and receiving, by the terminal, a RO response message including a protected RO from the rights issuing server.
    Type: Application
    Filed: January 28, 2010
    Publication date: August 12, 2010
    Inventors: Youn-Sung CHU, Seung-Jae Lee
  • Patent number: 7769177
    Abstract: A method of digital rights management for a broadcast-multicast service, the method comprising receiving a request from a terminal to join a service domain having a common group key; transmitting encryption of one or more service encryption keys using the common group key to the terminal that requested to join; and allowing the terminal to share the same contents and the same services with one or more other devices within the service domain.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: August 3, 2010
    Assignee: LG Electronics Inc.
    Inventors: Sung-Mu Son, Te-Hyun Kim, Dong-Hee Shim, Kyu-Sung Han, Min-Jung Shon, Seung-Jae Lee, Youn-Sung Chu
  • Publication number: 20100191976
    Abstract: A method, device and system for stably issuing a rights object (RO) to a memory, namely, an SRM, via a terminal. When RO has been issued to the memory card, namely, to the SRM, by using the stable procedure, the RO can be compatible with a different terminal that does not support the stable procedure, whereby the RO can be completely used by the different terminal.
    Type: Application
    Filed: December 9, 2009
    Publication date: July 29, 2010
    Inventors: Youn-Sung Chu, Te-Hyun Kim
  • Publication number: 20100042836
    Abstract: A secure transmission of a device management message via a broadcast (BCAST) channel, by which a BCAST server can securely transmit a device management message including an authentication value to a plurality of terminals via a one way BCAST channel, and accordingly the terminals is not required to use a separate channel for authenticating the device management message received from the BCAST server.
    Type: Application
    Filed: October 24, 2007
    Publication date: February 18, 2010
    Applicant: LG Electronics Inc.
    Inventors: Min-Jung Shon, Sung-Mu Son, Seung-Jae Lee, Youn-Sung Chu, Te-Hyun Kim
  • Publication number: 20090300775
    Abstract: A Digital Rights Management (DRM), and particularly a method for sharing a Rights Object (RO) of a certain DRM content between devices, wherein a certain device requests a Rights Issuer (RI) to upgrade its existing RO, and moves or copies the upgraded RO by the request to at least one or more other devices via a wired/wireless medium, thereby sharing the RO with the other devices.
    Type: Application
    Filed: April 5, 2007
    Publication date: December 3, 2009
    Inventors: Youn-Sung Chu, Te-Hyun Kim, Seung Jae Lee, Kiran Kumar
  • Publication number: 20090228960
    Abstract: Disclosed are a method and device for managing authorization to issue a domain rights object (RO) between devices (entities) in a digital rights management (DRM) system, in which a RDP Drop domain protocol is newly defined between DA/DEA and RI in the DRM system, thereby terminating authorization to create and issue a domain RO of RI for a specific domain, thus to effectively manage the authorization in the DRM system.
    Type: Application
    Filed: February 18, 2009
    Publication date: September 10, 2009
    Inventors: Youn-Sung Chu, Seung-Jae Lee
  • Publication number: 20090215467
    Abstract: A terminal and method and system for processing SUPL are discussed. According to one embodiment, the invention provides a method of processing a SUPL request for a terminal that has performed roaming, the method comprising: receiving a SUPL INIT message from a home SLP entity, the SUPL INIT message including an indicator that indicates whether a home SLP entity uses a proxy mode or a non-proxy mode; checking the indicator to determine whether the home SLP operates in the proxy mode or the non-proxy mode; and selectively performing authentication with the home SLP entity based on the checking result indicating whether the home SLP entity operates in the proxy mode or the non-proxy mode.
    Type: Application
    Filed: February 10, 2009
    Publication date: August 27, 2009
    Inventors: Dong-Hee SHIM, Youn-Sung Chu
  • Publication number: 20090209269
    Abstract: A terminal and method and system for processing SUPL are discussed. According to one embodiment, the invention provides a method of processing a SUPL request for a terminal that has performed roaming, the method comprising: receiving a SUPL INIT message from a home SLP entity, the SUPL INIT message including an indicator that indicates whether a home SLP entity uses a proxy mode or a non-proxy mode; checking the indicator to determine whether a first message or a second message should be transmitted to the home SLP entity; and transmitting the first message or the second message to the home SLP entity according to a result of the checking step.
    Type: Application
    Filed: February 10, 2009
    Publication date: August 20, 2009
    Inventors: Dong-Hee SHIM, Youn-Sung Chu
  • Publication number: 20090158439
    Abstract: A method for protecting unprotected content in digital rights management (DRM) and a device thereof. When non-protected content stored in a non-DRM device is to be transferred to a DRM device, the non-protected content are converted into protected content and then are transferred to other user's device.
    Type: Application
    Filed: April 10, 2007
    Publication date: June 18, 2009
    Inventors: Seung-Jae Lee, Te-Hyun Kim, Youn-Sung Chu, Kiran Kumar Keshavamurthy
  • Publication number: 20090125718
    Abstract: Disclosed is domain upgrade method in Digital Rights Management (DRM) capable of reducing network resources by simplifying signal procedures at the time of transferring changed domain keys. A device joining after domain upgrade is provided with only a domain key of a domain generation after the domain upgrade, but is not provided with a domain key of the previous domain generation. Accordingly, even if the joining device is mal-operated or is hacked, contents before upgrade are prevented from being illegally used or leaking out.
    Type: Application
    Filed: November 7, 2008
    Publication date: May 14, 2009
    Inventor: Youn-Sung CHU
  • Publication number: 20080184350
    Abstract: Disclosed is a Digital rights Management (DRM), and particularly a method and terminal for verifying membership in order to move Rights Object (RO) in a domain, the method implemented in a first embodiment in which a second device calculates a MAC value as a verified value to send to a first device before the first device moves a domain RO to the second device, and accordingly the first device verifies that the second device is a properly subscribed domain member to thereafter move the domain RO, and a second embodiment in which when the first device calculates a first verified value to send to a second device, the second device verifies whether the first device is a properly subscribed domain member and then calculates a second verified value to send to the first device, and the first device also verifies whether the second device is a properly subscribed domain member to thereafter send the domain RO to the second device.
    Type: Application
    Filed: August 31, 2007
    Publication date: July 31, 2008
    Applicant: LG Electronics, Inc.
    Inventor: Youn-Sung CHU
  • Publication number: 20080126248
    Abstract: A method and system for managing at least one DRM agent intending to join or leave a user domain in a Digital Rights Management (DRM) is provided, in which a Domain Enforcement Agent (DEA) manages the joining and leaving of the DRM agent resident in a home network it manages, and a Domain Authority (DA) provides a domain key to a DRM agent joining the user domain.
    Type: Application
    Filed: June 29, 2007
    Publication date: May 29, 2008
    Inventors: Seung-Jae LEE, Te-Hyun Kim, Youn-Sung Chu, Kiran Kumar Keshavamurthy
  • Publication number: 20080109650
    Abstract: When a SET receives a positioning service from a V-SLP by performing a roaming from a H-SLP to the V-SLP in a SUPL-based positioning system, only a new TLS connection is generated using an abbreviated handshake protocol without generating anew TLS session after the roaming. That is, when opening a TLS session for ensuring security in a SUPL-based positioning method, in particular, when opening a new TLS session between the V-SLP (V-SPC) and the SET after opening the TLS session between the H-SLP and the SET, the key information having used in the previous TLS session is provided to the V-SLP to set a new TLS connection, thereby reducing a load of an entire system.
    Type: Application
    Filed: January 9, 2006
    Publication date: May 8, 2008
    Inventors: Dong-Hee Shim, Youn-Sung Chu
  • Publication number: 20080010209
    Abstract: A method for managing a specific domain (or user domain), for example leaving the domain by a specific device after fully returning a Rights Object (RO) taken by the specific device, instead of deactivating the RO, when leaving the specific domain, the method in which the device desiring to leave the specific domain moves its RO to another device desiring to join the specific domain and thereafter leaves the specific domain under the control of a Domain Authority/Domain Enforcement Agent (DA/DEA).
    Type: Application
    Filed: June 8, 2007
    Publication date: January 10, 2008
    Inventors: Seung-Jae LEE, Te-Hyun Kim, Youn-Sung Chu, Kiran Keshavamurthy
  • Publication number: 20070172065
    Abstract: An apparatus and method for transferring a Rights Object (RO)for a content between devices via a server, wherein a sending device converts a first RO taken by itself to encode into a second RO, and sends an RO move request message including the second RO to the server, whereas the server converts the second RO included in the RO move request message into a third RO and transfers the third RO to a receiving device, whereby the receiving device receives the third RO from the server for installation, wherein the sending device deletes or modifies the first RO at an appropriate time point.
    Type: Application
    Filed: January 25, 2007
    Publication date: July 26, 2007
    Inventors: Seung-Jae Lee, Te-Hyun Kim, Youn-Sung Chu, Sung-Mu Son, Kiran Kumar Keshavamurthy
  • Publication number: 20060225090
    Abstract: A SUPL enabled terminal, method and system for processing SUPL are discussed. According to one embodiment, the SUPL enabled terminal includes a processor to process a SUPL location platform (SLP) mode indicator received in a SUPL initiation message, the SLP mode indicator indicating whether the terminal is to operate according to a proxy mode or a non-proxy mode.
    Type: Application
    Filed: March 28, 2006
    Publication date: October 5, 2006
    Inventors: Dong-Hee Shim, Youn-Sung Chu
  • Publication number: 20060206708
    Abstract: A method of digital rights management for a broadcast-multicast service, the method comprising receiving a request from a terminal to join a service domain having a common group key; transmitting encryption of one or more service encryption keys using the common group key to the terminal that requested to join; and allowing the terminal to share the same contents and the same services with one or more other devices within the service domain.
    Type: Application
    Filed: January 13, 2006
    Publication date: September 14, 2006
    Applicant: LG Electronics Inc.
    Inventors: Sung-Mu Son, Te-Hyun Kim, Dong-Hee Shim, Kyu-Sung Han, Min-Jung Shon, Seung-Jae Lee, Youn-Sung Chu