![]() ![]() Original Assignee International Business Machines Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Hongxia Jin Jeffrey Bruce Lotspiech Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number US12/192,962 Other versions US8422684B2 Google Patents US20100040231A1 - Security Classes in a Media Key Block ![]() US20100040231A1 - Security Classes in a Media Key Block
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