Browse Prior Art Database

Copyright Protection Gateway Disclosure Number: IPCOM000021454D
Original Publication Date: 2004-Jan-20
Included in the Prior Art Database: 2004-Jan-20
Document File: 2 page(s) / 103K

Publishing Venue



This discloses a method to protect the copyright of the content, especially in wireless environment. While traditional DRM systems use cryptography to protect the contents, our invention only stamp a special stamp (e.g. by watermarking) into the contents, which would let legacy devices to play the contents well. While the stamped contents are forwarded through wireless gateway, the copyright protection gateway would detect the stamp and charge/block this forward.

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Copyright Protection Gateway

Main Idea

1. Background: What is the problem solved by your invention? Describe known solutions to this problem (if any). What are the drawbacks of such known solutions, or why is an additional solution required? Cite any relevant technical documents or references.

The widely use of wireless devices makes wireless content delivery a
great potential market, and how to protect the copyright of these
contents is still an open question.
Since most mobile phones today are still dummy terminals, it is
difficult to make crypto-based DRM technology be smoothly migrated. And
even for the smart terminals, their operating systems and hardware
differ largely. There is a great need from the operators to develop a
client-ignorant copyright protection solution. And our invention is such
a solution; it can be used for any terminals, whether dummy or smart.

2. Summary of Invention: Briefly describe the core idea of your invention (saving the details for questions #3 below). Describe the advantage(s) of using your invention instead of the known solutions described above.

In our invention, the content owner should insert a 'copyright stamp'
into the content to be delivered. When the network operator finds there
is a message including a copyright stamp, it should judge whether this
delivery is legal. If the answer is yes, the operator could deliver the
message, or it should be blocked.
Traditional crypto-based DRM requires client support, but most mobile
clients nowadays cannot support DRM. Our invention is about how to block
illegal delivery of copyright protected contents, so it can be used in
any environment, whether the client can or cannot support DRM. In
current stage of market, it is a fairly good solution to protect the
copyright. Even in the day when most clients can support DRM, this
solution can also be used to enhance the security of the whole system.
Our invention can be used with or without a traditional crypto-based DRM
system, and can be used for some other scenarios. For example,
enterprises may have interest to prevent their confidential materials
from illegal distribution, so their gateway may use our invention to
protect the confidential materials.

3. Description: Describe how your invention works, and how it could be implemented, using text, diagrams and flow charts as appropriate.

Below figure 1 shows the architecture of the Copyright Protection


Raw ContentStamper Stamped Content

Figure 1: Architecture of Copyright Protection Gateway

Certificate Center

ContentContent Filter

DeliveryLegal Content


Illegal Content

Block Log


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First, there is a certificate center, which could be run by either the
operator or the 3rd party.
The content owner should get a certificate from the certificate cent...