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.

Date of Patent:
Aug. 06, 2013

Filed:

Apr. 29, 2008
Applicants:

Jun Yao, Suwon-si, KR;

Choong-hoon Lee, Seoul, KR;

Su-hyun Nam, Seoul, KR;

Inventors:

Jun Yao, Suwon-si, KR;

Choong-hoon Lee, Seoul, KR;

Su-hyun Nam, Seoul, KR;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01);
U.S. Cl.
CPC ...
Abstract

Provided is a method of protecting a content consumer's privacy. The method includes classifying contents into content groups, encrypting the contents using different encryption keys, generating a plurality of decryption keys each of which can decrypt all contents in each of the content groups, and provides the generated decryption keys to authorized clients, wherein each client is provided with a different decryption key.


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