Invention Grant
US07864953B2 Adding an additional level of indirection to title key encryption
有权
为标题密钥加密添加一个附加级别的间接
- Patent Title: Adding an additional level of indirection to title key encryption
- Patent Title (中): 为标题密钥加密添加一个附加级别的间接
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Application No.: US12056626Application Date: 2008-03-27
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Publication No.: US07864953B2Publication Date: 2011-01-04
- Inventor: Julian A. Cerruti , Matthew Francis Rutkowski , Amal Ahmed Shaheen
- Applicant: Julian A. Cerruti , Matthew Francis Rutkowski , Amal Ahmed Shaheen
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Schubert Law Group PLLC
- Agent Libby Z. Toub
- Main IPC: H04L9/00
- IPC: H04L9/00

Abstract:
Systems, methods and media for encrypting and decrypting content files are disclosed. More particularly, hardware and/or software for adding an additional level of indirection to a title key encryption scheme are disclosed. Embodiments may include generating by a cryptographic system a binding key based on binding information. Embodiments may also include encrypting by the cryptographic system a secret key with the binding key and generating a title key associated with at least one content file. Embodiments may also include encrypting by the cryptographic system the title key with the secret key and the at least one content file with the title key. Further embodiments may include receiving an indication that the binding information has changed, generating a new binding key based on the new changed binding information, and re-encrypting the secret key with the new binding key.
Public/Granted literature
- US20090028342A1 Systems, Methods, and Media for Adding an Additional Level of Indirection to Title Key Encryption Public/Granted day:2009-01-29
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