US 9,300,465 B2Granted

Method, system and program product for attaching a title key to encrypted content for synchronized transmission to a recipient

AssigneeInternational Business Machines Corporation

InventorsEric M. Foster, Jeffrey B. Lotspiech, Florian Pestoni, Wilfred E. Plouffe, Jr., Frank A. Schaffa

Life of this patent

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Abstract

A method and system for attaching a title key to encrypted content for synchronized transmission to, or storage by, a recipient is provided. Specifically, under the present invention, an elementary media stream is parceled into content units that each include a content packet and a header. The content packets are encrypted with one or more title keys. Once the content packets have been encrypted, the title keys are themselves encrypted with a key encrypting key. The encrypted title keys are then attached to the corresponding encrypted content packets for synchronized transmission to a recipient.

Claims6

Dependent claims

A method for processing, with a computing device, encrypted content received by the computing device via a synchronized transmission of an elementary content stream, the method comprising:

receiving, with the computing device, the elementary content stream via a synchronized transmission of a plurality of content units each containing a portion of the elementary content stream and each including a respective header and a respective content packet of the elementary content stream;
retrieving, with the computing device, an encrypted title key, a verifier and identifier information from a respective header of each content unit of the elementary content stream;
generating, with the computing device, a title key by decrypting the encrypted title key with a key encrypting key;
verifying, with the computing device, the title key using the verifier;
and
decrypting, with the computing device, the content using the title key.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/034,421Filed 20 Feb 2008 · continuation
Priority: 18 Apr 2002
Published: US 2008/0273702 A16 Nov 2008
Granted: 29 Mar 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04L 9/0822
Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely…: using…
H04L 9/083
Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely…:…
H04L 9/12
Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols: transmitting and receiving…
H04L 63/045
Wherein the data content is protected, e.g. by encrypting or encapsulating the payload: wherein the sending and receiving network entities apply…

Family

Application10/124,873Parent of this continuation · filed 18 Apr 2002
US 2008/0273702 A1Pre-grant publication · published 6 Nov 2008
US 7,356,147 B2Parent of this continuation
US 2003/0200176 A1Published application
US 9,300,465 B2This patent

From the US filing history. Foreign family members aren’t listed.