Patents by Inventor Kun-uk Kim

Kun-uk Kim 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).

  • Method for generating rights object and device to perform the method, method for transmitting rights object and device to perform the method, and method for receiving rights object and device to perform the method
    Patent number: 8699706
    Abstract: A method for transmitting a Rights Object (RO) includes generating a password key by encrypting a password, generating the RO using the password key, and transmitting the RO from a first device to a second device. The second device and the first device share the password and the second device generates the password key using the same encryption method as that used by the first device to generate the password key. The second device decrypts a Message Authentication Code (MAC) key and a Rights Object Encryption Key (REK) using the password key, decrypts a Content Encryption Key (CEK) using the decrypted REK, and verifies integrity of the RO using the decrypted MAC key. The second device can use and/or access content associated with the RO using the decrypted CEK. The CEK may be generated by the first device or may be the CEK from a Rights Issuer.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: April 15, 2014
    Assignee: Pantech Co., Ltd.
    Inventor: Kun-uk Kim
  • Method for generating rights object and device to perform the method, method for transmitting rights object and device to perform the method, and method for receiving rights object and device to perform the method
    Patent number: 8327145
    Abstract: A method for transmitting a Rights Object (RO) includes generating a password key by encrypting a password, generating the RO using the password key, and transmitting the RO from a first device to a second device. The second device and the first device share the password and the second device generates the password key using the same encryption method as that used by the first device to generate the password key. The second device decrypts a Message Authentication Code (MAC) key and a Rights Object Encryption Key (REK) using the password key, decrypts a Content Encryption Key (CEK) using the decrypted REK, and verifies integrity of the RO using the decrypted MAC key. The second device can use and/or access content associated with the RO using the decrypted CEK. The CEK may be generated by the first device or may be the CEK from a Rights Issuer.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: December 4, 2012
    Assignee: Pantech Co., Ltd.
    Inventor: Kun-uk Kim
  • METHOD FOR GENERATING RIGHTS OBJECT AND DEVICE TO PERFORM THE METHOD, METHOD FOR TRANSMITTING RIGHTS OBJECT AND DEVICE TO PERFORM THE METHOD, AND METHOD FOR RECEIVING RIGHTS OBJECT AND DEVICE TO PERFORM THE METHOD
    Publication number: 20090249072
    Abstract: A method for transmitting a Rights Object (RO) includes generating a password key by encrypting a password, generating the RO using the password key, and transmitting the RO from a first device to a second device. The second device and the first device share the password and the second device generates the password key using the same encryption method as that used by the first device to generate the password key. The second device decrypts a Message Authentication Code (MAC) key and a Rights Object Encryption Key (REK) using the password key, decrypts a Content Encryption Key (CEK) using the decrypted REK, and verifies integrity of the RO using the decrypted MAC key. The second device can use and/or access content associated with the RO using the decrypted CEK. The CEK may be generated by the first device or may be the CEK from a Rights Issuer.
    Type: Application
    Filed: March 18, 2009
    Publication date: October 1, 2009
    Applicant: Pantech&Curitel Communications, Inc.
    Inventor: Kun-uk KIM