Invention Grant
- Patent Title: Watermarking system that executes received watermarking instructions to embed a watermark
- Patent Title (中): 执行接收水印指令以嵌入水印的水印系统
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Application No.: US11184308Application Date: 2005-07-18
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Publication No.: US08180708B2Publication Date: 2012-05-15
- Inventor: Marco M. Hurtado , Kenneth L. Milsted , Kha D. Nguyen
- Applicant: Marco M. Hurtado , Kenneth L. Milsted , Kha D. Nguyen
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Fleit Gibbons Gutman Bongini & Bianco PL
- Agent Stephen Bongini
- Main IPC: G06F21/00
- IPC: G06F21/00

Abstract:
A method of managing keys is provided. According to one exemplary method, digital content data encrypted with a first encrypting key is decrypted using a first decrypting key, and re-encrypted using a second encrypting key. A second decrypting key is encrypted using a third encrypting key to produce an encrypted second decrypting key. In some embodiments, an encrypted first decrypting key that was encrypted using a fourth encrypting key is received, and the encrypted first decrypting key is decrypted using a fourth decrypting key to reproduce the first decrypting key. An application for use on a computer system is also provided.
Public/Granted literature
- US20050251491A1 Key management system Public/Granted day:2005-11-10
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