| US 7,590,865 B2 | ||
| Method and apparatus for restriction use of storage medium using user key | ||
| Sung-hyu Han, Seoul (Korea, Republic of); Yun-sang Kim, Suwon-si (Korea, Republic of); Yang-lim Choi, Seongnam-si (Korea, Republic of); Yong-kuk You, Seoul (Korea, Republic of); and Hoc-chul Han, Suwon-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., Suwon-si (Korea, Republic of) | ||
| Filed on Sep. 30, 2004, as Appl. No. 10/953,579. | ||
| Claims priority of application No. 10-2003-0079914 (KR), filed on Nov. 12, 2003. | ||
| Prior Publication US 2005/0259816 A1, Nov. 24, 2005 | ||
| Int. Cl. H04L 9/32 (2006.01) | ||
| U.S. Cl. 713—189 [713/193; 380/44; 380/46] | 9 Claims |
| 1. A method of restricting use of a storage medium, the method comprising:
producing a data key using key production information and a random number;
encrypting user data by using the data key to generate encrypted data;
encrypting the random number by using a user key to generate an encrypted random number; and
storing the encrypted user data and the encrypted random number in the storage medium,
wherein the key production information is extracted from disc information stored in a lead-in area of the storage medium.
|