Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10609007 | Method and apparatus for controlling transmission of content data | Sang-su Choi, Yang-lim Choi, Jun-bum Shin, So-Young Lee, Ji-Young Moon | 2020-03-31 |
| 9590960 | Method and apparatus for controlling transmission of content data | Sang-su Choi, Yang-lim Choi, Jun-bum Shin, So-Young Lee, Ji-Young Moon | 2017-03-07 |
| 9015077 | Method and apparatus for efficiently encrypting/decrypting digital content according to broadcast encryption scheme | Bong-seon Kim, Myung-Sun Kim, Sung-hyu Han, Young-sun Yoon, Jae-heung Lee | 2015-04-21 |
| 8983071 | Key management method using hierarchical node topology, and method of registering and deregistering user using the same | Sung-hyu Han, Bong-seon Kim, Myung-Sun Kim, Young-sun Yoon, Jae-heung Lee | 2015-03-17 |
| 8341402 | Method of controlling content access and method of obtaining content key using the same | Sung-hyu Han, Myung-Sun Kim, Young-sun Yoon, Bong-seon Kim, Jae-heung Lee | 2012-12-25 |
| 8301571 | Method of packaging broadcast contents | Myung-Sun Kim, Sung-hyu Han, Young-sun Yoon, Jae-heung Lee, Bong-seon Kim +1 more | 2012-10-30 |
| 8229121 | Method of tracing device keys for broadcast encryption | Hak-soo Ju, Choong Hoon Lee, Young-sun Yoon, Jin-Mok Kim | 2012-07-24 |
| 8170215 | Key management method for home network and home network device and system using the same | Myung-Sun Kim, Su-hyun Nam, Sang-su Choi, Sung-hyu Han | 2012-05-01 |
| 8161296 | Method and apparatus for managing digital content | Myung-Sun Kim, Young-sun Yoon, Bong-seon Kim, Jae-heung Lee, Sung-hyu Han | 2012-04-17 |
| 8156344 | Method and apparatus for backing up and restoring domain information | Bong-seon Kim, Myung-Sun Kim, Sung-hyu Han, Young-sun Yoon, Jae-heung Lee | 2012-04-10 |
| 8122487 | Method and apparatus for checking proximity between devices using hash chain | Jae-heung Lee, Myung-Sun Kim, Sung-hyu Han, Young-sun Yoon, Bong-seon Kim | 2012-02-21 |
| 8005758 | Encryption/decryption method and apparatus for controlling content use based on license information | Myung-Sun Kim, Sung-hyu Han, Young-sun Yoon, Jae-heung Lee, Bong-seon Kim +1 more | 2011-08-23 |
| 7826615 | Scrambling apparatus and method using conversion of motion vector information of video data | Su-hyun Nam, Myung-Sun Kim, Yong Jin Jang, Jae-heung Lee, Sang-su Choi | 2010-11-02 |
| 7788728 | Method and apparatus for limiting number of times contents can be accessed using hash chain | Myung-Sun Kim, Su-hyun Nam, Yong Jin Jang, Jae-heung Lee | 2010-08-31 |
| 7653713 | Method of measuring round trip time and proximity checking method using the same | Sung-hyu Han, Myung-Sun Kim, Young-sun Yoon, Bong-seon Kim, Jae-heung Lee | 2010-01-26 |