Patents by Inventor Inhyok Cha

Inhyok Cha 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: 8769308
    Abstract: A wireless communication device is configured as an in-home node-B (H(e)NB). The H(e)NB is configured to perform a locking function to control modification of carrier and user controlled parameters, and also configured to detect a change in location.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: July 1, 2014
    Assignee: Interdigital Technology Corporation
    Inventors: Rajat P. Mukherjee, Shankar Somasundaram, Ulises Olvera-Hernandez, Yogendra C. Shah, Prabhakar R. Chitrapu, Inhyok Cha
  • Patent number: 8769298
    Abstract: The present invention discloses several methods to strengthen the integrity of entities, messages, and processing related to content distribution as defined by the Open Mobile Alliance (OMA) Digital Rights Management (DRM). The methods use techniques related to the Trusted Computing Group (TCG) specifications. A first embodiment uses TCG techniques to verify platform and DRM software integrity or trustworthiness, both with and without modifications to the DRM rights object acquisition protocol (ROAP) and DRM content format specifications. A second embodiment uses TCG techniques to strengthen the integrity of ROAP messages, constituent information, and processing without changing the existing ROAP protocol. A third embodiment uses TCG techniques to strengthen the integrity of the ROAP messages, information, and processing with some changes to the existing ROAP protocol.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: July 1, 2014
    Assignee: InterDigital Technology Corporation
    Inventors: Inhyok Cha, Amit Singhal, Yogendra C. Shah
  • Publication number: 20140179271
    Abstract: Methods and instrumentalities are disclosed that enable one or more domains on one or more devices to be owned or controlled by one or more different local or remote owners, while providing a level of system-wide management of those domains. Each domain may have a different owner, and each owner may specify policies for operation of its domain and for operation of its domain in relation to the platform on which the domain resides, and other domains. A system-wide domain manager may be resident on one of the domains. The system-wide domain manager may enforce the policies of the domain on which it is resident, and it may coordinate the enforcement of the other domains by their respective policies in relation to the domain in which the system-wide domain manager resides. Additionally, the system-wide domain manager may coordinate interaction among the other domains in accordance with their respective policies. A domain application may be resident on one of the domains.
    Type: Application
    Filed: December 6, 2011
    Publication date: June 26, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Louis J. Guccione, Michael V. Meyerstein, Inhyok Cha, Andreas Schmidt, Andreas Leicher, Yogendra C. Shah
  • Patent number: 8756427
    Abstract: The present invention is related to a wireless transmit/receive unit (WTRU) for providing advanced security functions. The WTRU includes trusted platform module (TPM) for performing trusted computing operations; and a secure time component (STC) for providing a secure measurement of a current time. The STC and the TPM are integrated to provide accurate trusted time information to internal and external to the WTRU. The STC may be located on an expanded a subscriber identity module (SIM), on the WTRU platform, or two STCs may be used, one in each location. Similarly, the TPM may be located on an expanded SIM, on the WTRU platform, or two TPMs may be used, one in each location. Preferably, the STC will include a real time clock (RTC); a tamper detection and power failure unit; and a time report and sync controller.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: June 17, 2014
    Assignee: InterDigital Technology Corporation
    Inventors: Yogendra C. Shah, Inhyok Cha
  • Publication number: 20140133654
    Abstract: A secret stream of bits begins by receiving a public random stream contained in a wireless communication signal at a transmit/receive unit. The public random stream is sampled and specific bits are extracted according to a shared common secret. These extracted bits are used to create a longer secret stream. The shared common secret may be generated using JRNSO techniques, or provided to the transmit/receive units prior to the communication session. Alternatively, one of the transmit/receive unit is assumed to be more powerful than any potential eavesdropper. In this situation, the powerful transmit/receive unit may broadcast and store a public random stream. The weaker transmit/receive unit selects select random bits of the broadcast for creating a key. The weaker transmit/receive unit sends the powerful transmit/receive unit the selected bit numbers, and powerful transmit/receive unit uses the random numbers to produce the key created by the weaker transmit/receive unit.
    Type: Application
    Filed: January 21, 2014
    Publication date: May 15, 2014
    Applicant: Interdigital Technology Corporation
    Inventors: Alexander Reznik, Alain C. Briancon, Yevgeniy Dodis, Yogendra C. Shah, Chunxuan Ye, Robert A. DiFazio, Inhyok Cha
  • Publication number: 20140129815
    Abstract: A device may include a trusted component. The trusted component may be verified by a trusted third party and may have a certificate of verification stored therein based on the verification by the trusted third party. The trusted component may include a root of trust that may provide secure code and data storage and secure application execution. The root of trust may also be configured to verify an integrity of the trusted component via a secure boot and to prevent access to the certain information in the device if the integrity of the trusted component may not be verified.
    Type: Application
    Filed: April 15, 2010
    Publication date: May 8, 2014
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Yogendra C. Shah, Inhyok Cha, Andreas Schmidt, Andreas Leicher, Joseph Gredone, Samian J. Kaur
  • Publication number: 20140123292
    Abstract: A method for an apparatus which operates in a data cloud includes requesting trust information from a service cloud, receiving the trust information from the service cloud, performing a trust assessment of the service cloud based on the trust information, and controlling transmission of data to the service cloud according to a result of the trust assessment.
    Type: Application
    Filed: October 30, 2012
    Publication date: May 1, 2014
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Andreas SCHMIDT, Andreas LEICHER, Lakshmi SUBRAMANIAN, Won Young KIM, Inhyok Cha, Ji Yeon Choi
  • Patent number: 8707409
    Abstract: A method and apparatus for password management and single sign-on (SSO) access based on trusted computing (TC) technology. The methods implement the Trusted Computing Group (TCG)'s trusted platform module (TPM), which interacts with both proxy SSO unit and web-accessing applications to provide a secure, trusted mechanism to generate, store, and retrieve passwords and SSO credentials. The various embodiments of the present invention allow a user to hop securely and transparently from one site to another that belong to a pre-identified group of sites, after signing on just once to a secured proxy residing at the user's device.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: April 22, 2014
    Assignee: InterDigital Technology Corporation
    Inventors: Yogendra C. Shah, Inhyok Cha, Alexander Reznik
  • Patent number: 8701205
    Abstract: A device may include a trusted component. The trusted component may be verified by a trusted third party and may have a certificate of verification stored therein based on the verification by the trusted third party. The trusted component may include a root of trust that may provide secure code and data storage and secure application execution. The root of trust may also be configured to verify an integrity of the trusted component via a secure boot and to prevent access to the certain information in the device if the integrity of the trusted component may not be verified.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: April 15, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Yogendra C. Shah, Inhyok Cha, Andreas Schmidt, Andreas Leicher, Joseph Gredone, Samian Kaur
  • Patent number: 8675617
    Abstract: A client station in a wireless local area network (WLAN) communication system includes a beam commutation algorithm and a smart antenna responsive to the beam commutation algorithm for selecting one of a plurality of directional antenna beams. The smart antenna is configured as a virtual omni-directional antenna by using a commutation of switched directional antenna beams. A switched directional antenna system that performs a commutation sequencing can be blind to environmental conditions and changes.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: March 18, 2014
    Assignee: Interdigital Technology Corporation
    Inventors: Inhyok Cha, Keith Baldwin, Yingxue Li
  • Publication number: 20140047528
    Abstract: A wireless device may perform a local authentication to reduce the traffic on a network. The local authentication may be performed using a local web server and/or a local OpenID provider (OP) associated with the wireless device. The local web server and/or local OP may be implemented on a security module, such as a smartcard or a trusted execution environment for example. The local OP and/or local web server may be used to implement a provisioning phase to derive a session key, associated with a service provider, from an authentication between the wireless device and the network. The session key may be reusable for subsequent local authentications to locally authenticate a user of the wireless device to the service provider.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 13, 2014
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Andreas U. Schmidt, Michael V. Meyerstein, Andreas Leicher, Yogendra C. Shah, Louis J. Guccione, Inhyok Cha
  • Patent number: 8634558
    Abstract: A secret stream of bits begins by receiving a public random stream contained in a wireless communication signal at a transmit/receive unit. The public random stream is sampled and specific bits are extracted according to a shared common secret. These extracted bits are used to create a longer secret stream. The shared common secret may be generated using JRNSO techniques, or provided to the transmit/receive units prior to the communication session. Alternatively, one of the transmit/receive unit is assumed to be more powerful than any potential eavesdropper. In this situation, the powerful transmit/receive unit may broadcast and store a public random stream. The weaker transmit/receive unit selects select random bits of the broadcast for creating a key. The weaker transmit/receive unit sends the powerful transmit/receive unit the selected bit numbers, and powerful transmit/receive unit uses the random numbers to produce the key created by the weaker transmit/receive unit.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: January 21, 2014
    Assignee: InterDigital Technology Corporation
    Inventors: Alexander Reznik, Alain C. Briancon, Yevgeniy Dodis, Yogendra C. Shah, Chunxuan Ye, Robert A. DiFazio, Inhyok Cha
  • Patent number: 8630620
    Abstract: A method and apparatus for securing location information and access control using the location information are disclosed. A wireless transmit/receive unit (WTRU) includes a location sensing entity and a subscriber identity module (SIM). The location sensing entity generates location information of the WTRU and the location information is embedded in a message in an SIM. A trusted processing module in the WTRU verifies integrity of the location information. The trusted processing module may be on the SIM. The location information may be physical location information or contextual location-related information. The trusted processing module is configured to cryptographically secure and bind the location information to the WTRU, and verify trust metrics of an external entity prior to granting an access to the location information or accepting information from the external entity. The trusted processing module may be a trusted computing group (TCG) trusted platform module (TPM) or mobile trusted module (MTM).
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: January 14, 2014
    Assignee: InterDigital Technology Corporation
    Inventors: Inhyok Cha, Yogendra C. Shah, Chunxuan Ye
  • Patent number: 8631466
    Abstract: Systems, methods, and instrumentalities are disclosed to provide secure operations in an M2M device. An M2M device may receive an indication that an operation to be performed is security sensitive. The M2M device may determine that the operation is to be performed in a secure environment on the M2M device. The secure environment may be a logically distinct portion of the M2M device. The determination may be made in in accordance with a policy. For example, the M2M device may determine that the operation meets a requirement specified in the policy indicating that the operation is to be performed in the secure environment. The M2M device may perform the operation in the secure environment on the M2M device. The M2M device may store a result relating to the operation in the secure environment.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: January 14, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Inhyok Cha, Michael Meyerstein, Lawrence Case
  • Publication number: 20130315221
    Abstract: A method and apparatus for exchanging antenna capability information between a transmitting station (STA) and a receiving STA in a wireless communication system may include an antenna capability information element (IE) that includes information regarding the capability of the transmitting STA. The antenna capability IE may be transmitted from the transmitting STA to the receiving STA prior to data transmission between the transmitting STA and the receiving STA. When used in a wireless local area network, the antenna capability IE may be transmitted as part of a management frame, control frame, or data frame.
    Type: Application
    Filed: August 2, 2013
    Publication date: November 28, 2013
    Applicant: InterDigital Technology Corporation
    Inventors: Arty Chandra, Inhyok Cha, Paul Marinier, Vincent Roy
  • Publication number: 20130312125
    Abstract: A method and apparatus to establish a trustworthy local time based on trusted computing methods are described. The concepts are scaling because they may be graded by the frequency and accuracy with which a reliable external time source is available for correction and/or reset, and how trustworthy this external source is in a commercial scenario. The techniques also take into account that the number of different paths and number of hops between the device and the trusted external time source may vary. A local clock related value which is protected by a TPM securely bound to an external clock. A system of Accuracy Statements (AS) is added to introduce time references to the audit data provided by other maybe cheaper sources than the time source providing the initial time.
    Type: Application
    Filed: July 24, 2013
    Publication date: November 21, 2013
    Applicant: Interdigital Technology Corporation
    Inventors: Andreas Schmidt, Christian Hett, Yogendra C. Shah, Inhyok Cha
  • Publication number: 20130294537
    Abstract: A method and apparatus for selecting an antenna mapping in multiple-in/multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measured long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.
    Type: Application
    Filed: July 8, 2013
    Publication date: November 7, 2013
    Inventors: Inhyok CHA, Eldad M. ZEIRA, Keith Richard BALDWIN
  • Patent number: 8533803
    Abstract: A trusted computing environment, such as a smartcard, UICC, Java card, global platform, or the like may be used as a local host trust center and a proxy for a single-sign on (SSO) provider. This may be referred to as a local SSO provider (OP). This may be done, for example, to keep authentication traffic local and to prevent over the air communications, which may burden an operator network. To establish the OP proxy in the trusted environment, the trusted environment may bind to the SSO provider in a number of ways. For example, the SSO provider may interoperate with UICC-based UE authentication or GBA. In this way, user equipment may leverage the trusted environment in order to provide increased security and reduce over the air communications and authentication burden on the OP or operator network.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: September 10, 2013
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Inhyok Cha, Andreas Schmidt, Andreas Leicher, Yogendra C. Shah, Louis J. Guccione, Dolores F. Howry
  • Publication number: 20130212637
    Abstract: Systems, methods, and instrumentalities are disclosed that allow a user to initiate migration of a credential from one domain to another domain. A request to initiate a migration of credentials from a first domain to a second domain may be initiated by a user (1a.). A remote owner may receive a message indicating that the migration has been requested. The message received by the remote owner may be an indication that the source and destination devices have performed internal checks and determined that a migration could proceed. The remote owner may evaluate source information received from the source device and destination information received from the destination device (6), (6a.), (6b.). Based on the evaluation of the source information and the destination information, the remote owner may determine that the migration is acceptable. The remote owner may send an indication to proceed with the migration (7), (7a.
    Type: Application
    Filed: March 2, 2011
    Publication date: August 15, 2013
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Louis Guccione, Inhyok Cha, Andreas Schmidt, Andreas Leicher
  • Patent number: 8509431
    Abstract: A wireless device may perform a local authentication to reduce the traffic on a network. The local authentication may be performed using a local web server and/or a local OpenID provider (OP) associated with the wireless device. The local web server and/or local OP may be implemented on a security module, such as a smartcard or a trusted execution environment for example. The local OP and/or local web server may be used to implement a provisioning phase to derive a session key, associated with a service provider, from an authentication between the wireless device and the network. The session key may be reusable for subsequent local authentications to locally authenticate a user of the wireless device to the service provider.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: August 13, 2013
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Andreas U. Schmidt, Michael V. Meyerstein, Andreas Leicher, Yogendra C. Shah, Louis J. Guccione, Inhyok Cha