Applying Digital Watermarking Technology to Control CD copying
description
Transcript of Applying Digital Watermarking Technology to Control CD copying
![Page 1: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/1.jpg)
Applying Digital Watermarking Technology to Control CD
copyingBY
CHAYAN RATTANAVIJAI
![Page 2: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/2.jpg)
Problem Descriptions
• Software piracy
• Software industry lost billions of dollars each year
• Discourages individuals and businesses to create innovative software
• Discourages technology transfers between nations
Source:SIIA’s Report on Global Software Piracy 2000
![Page 3: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/3.jpg)
Motivations of pirates• Low cost of reproduction
• Price of CD writer is about $200• Price of CD-Duplicator is about $2000
• Easily access to tools• CD-R, CD-RW, CD-Duplicator
• Take short time• Take about 7 mins with speed of 8x CD-R to copy• Take less than 1 min to copy with CD-Duplicator
• Ineffective of intellectual property law• Not enough law enforcement
• High Demand
![Page 4: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/4.jpg)
Ordinary Pirates
• You make copies of a software to your three best friends
• Each of your best friends make copies of the software to his three best friends
![Page 5: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/5.jpg)
Exponential Growth of three
Exponential Growth (3^x)
0
200000
400000
600000
800000
1000000
1200000
1400000
1600000
1800000
1 2 3 4 5 6 7 8 9 10 11 12 13
Times
Un
its
![Page 6: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/6.jpg)
Objectives
• To review the components that are being built in to consumer devices
• To study how the components are working
• To study how to apply the components to software industry
![Page 7: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/7.jpg)
Goal
• To help reduce the number of software piracy
![Page 8: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/8.jpg)
Basic idea of Watermarking
![Page 9: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/9.jpg)
What is Digital Watermarking?
• A digital watermark is a piece of information embedded inside a digital object.
• It is either visible or invisible.
![Page 10: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/10.jpg)
Digital marks can be used to:
1. Identify the origin of the data or uniquely establish ownership
2. Identify the recipient of the data
3. Check integrity of the data
![Page 11: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/11.jpg)
Terminology
• Content Scrambling System (CSS) developed by Matsushita, a device requires a pair of keys, is used to descramble data.
• Secure Transmission System provides a mechanism for pair of compliant devices on a computer bus to exchange keys.
![Page 12: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/12.jpg)
Terminology (continues)
• Copy Generation Management System (CGMS) is simply a pair of bits in the header of data stream that encode one of three possible rules for copying: “copy-always”, “copy-never”, “copy-once”.
![Page 13: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/13.jpg)
Terminology (continues)
• Analog Protection System (APS) , developed by Macrovision, is a method of modifying NTSC signals so that they can be displayed on television, but cannot be recorded on VCR’s
![Page 14: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/14.jpg)
CD copy protection without watermarking
• Legal disks will be scrambled with CSS and can be played only on compliant devices. Bit-for-bit copies of these disks won’t be playable on any devices, because they won’t contain the descrambling keys. This in ensured by storing the keys on the lead-in area of the legal disk, which is only read by compliant drives.
![Page 15: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/15.jpg)
CD copy protection without watermarking
![Page 16: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/16.jpg)
Problem
1. CGMS in intended to prevent illegal copies, however a non compliant player may strip out these copy control bits from the header, leaving the data unprotected.
2. APS works only when the display device is a compliant. A pirate can simply route it into an appropriate non-compliant recorder and make an unencrypted copy. Such a copy would not contain the CGMS bits.
![Page 17: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/17.jpg)
CD copy protection with watermarking
• Record control takes over the job of CGMS. It works regardless of how the data reaches the compliant recorder, since the watermark that contains the CGMS data is never removed by normal processing.
![Page 18: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/18.jpg)
CD copy protection with watermarking
![Page 19: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/19.jpg)
Purpose of introducing watermarking into the system
• To improve the protection provided by CGMS by making the copy control information harder to remove
• To make unencrypted copies unplayable on compliant devices
![Page 20: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/20.jpg)
Facilities & Resources
• Need a laboratory
• Need experts to help implement the prototype
• Need the special hardware and technology
![Page 21: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/21.jpg)
Future implementation
• The watermark system requires enforcement to the device manufacturers to implement watermark detectors in their products
• Better encryption algorithm in the watermark (IBM-Data Hiding)
![Page 22: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/22.jpg)
Conclusion
• This research shows how to apply the watermarking to make it harder to reproduce the illegal software
• The experiment from the laboratory will give us the result.
• The prototype may be developed to help reduce the numbers of software piracy.
![Page 23: Applying Digital Watermarking Technology to Control CD copying](https://reader036.fdocuments.us/reader036/viewer/2022062519/5681529d550346895dc0c3a4/html5/thumbnails/23.jpg)
THE END