The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2008
Filed:
Feb. 08, 2000
Young-soon Cho, Pyungtaek, KR;
Myeong-joon Kang, Pyungtaek, KR;
Jae-young Kim, Seoul, KR;
Han Jung, Seoul, KR;
Young-Soon Cho, Pyungtaek, KR;
Myeong-Joon Kang, Pyungtaek, KR;
Jae-Young Kim, Seoul, KR;
Han Jung, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A digital data file encryption apparatus and method, where a digital data server identifies the user and supplies an encrypted digital data file to the user in accordance with the identified result. A personal computer decrypts the encrypted digital data file supplied from the digital data server and reproduces the decrypted digital data file or re-encrypts it using an encryption key. The encryption key is generated on the basis of an identification number of a data storage medium or digital data playing device. A digital data playing device stores the re-encrypted digital data file downloaded from the personal computer in the data storage medium and decrypts the stored digital data file using the encryption key to reproduce it. A first internal key is added to the identification number to convert the identification number into the encryption key, which is then encrypted according to an encryption algorithm based on a second internal key. The digital data file is the encrypted using the encrypted encryption key.