Novel Watermarking Process Protects Video Producers And Purchasers

July 06, 1998

CHAMPAIGN, Ill. -- With the rapid growth of multimedia systems, problems associated with multimedia security and copyright protection have become major issues. Researchers at the University of Illinois have developed a watermarking process that protects both the original owner and legitimate customers of copyright multimedia data.

"A number of digital watermarking techniques have been proposed in recent years, but none has fully addressed the problems of proving rightful ownership or protecting a customer's right to use the material," said Klara Nahrstedt, a U. of I. professor of computer science.

"The purpose of a watermark is to protect the owner's copyright," Nahrstedt said. "Without a careful design and proper requirements on the watermark, however, an attacker can easily manipulate the watermarked material and confuse rightful ownership."

To create a tamper-proof watermark, Nahrstedt and graduate student Lintian Qiao developed a watermark construction algorithm that combines a standard encryption function with part of the original video image. Because the resulting watermark is dependent upon both the original material and the encryption function, rightful ownership is easily determined.

"To prove ownership, both the original material and the watermark construction algorithm are required for the verification process," Nahrstedt said. "Therefore, manipulated watermarks are easy to identify and discredit."

The researchers' watermarking process also can be used to protect the rights of legitimate customers, an important feature not found in other watermarking techniques.

"Currently, sellers of video information have complete control over the watermarking procedure, and customers have no way to prove their rights to use the watermarked data," Nahrstedt said. "To provide proper protection to customers, the watermarking framework needs protocols that involve both owners and customers."

One such protocol, designed by Nahrstedt and Qiao, encodes a customer's unique identification into the owner's watermark at the point of purchase. This creates a unique watermark for each purchase, and ensures that only legal customers can prove their rights to use the material.

"The ideal watermark should be invisible, create minimal distortion and be extremely difficult to remove," Nahrstedt said. "The integration of our watermarking scheme with the customer's right protocols creates a robust framework that resolves rightful ownership and protects customer's rights."Nahrstedt and Qiao described their watermarking process at the IEEE International Conference on Multimedia Computing and Systems, held June 28 through July 1, in Austin, Texas.


University of Illinois at Urbana-Champaign

Related Watermark Articles from Brightsurf:

Kidney patients benefit using organs from Hepatitis C-infected donors
Kidney patients benefit by accepting kidneys from donors with hepatitis C, according to a University of Cincinnati physician-researcher.

A technology for embedding data in printed objects
A team from Nara Institute of Science and Technology, composed of Ph.D.

Stranded whales detected from space
A new technique for analysing satellite images may help scientists detect and count stranded whales from space.

The new great wave
Radical Inkless Technology produces the world's smallest 'Ukiyo-e' and promises to revolutionize how we print.

Outsmarting deep fakes: AI-driven imaging system protects authenticity
To thwart sophisticated deep fake methods of altering photos and video, researchers at the NYU Tandon School of Engineering devised a technique to authenticate images throughout the entire pipeline, from acquisition to delivery, using artificial intelligence (AI).

How intelligent is artificial intelligence?
Scientists are putting AI systems to a test. Researchers from TU Berlin, Fraunhofer Heinrich Hertz Institute HHI and Singapore University of Technology and Design (SUTD) have developed a method to provided a glimpse into the diverse 'intelligence' spectrum observed in current AI systems, specifically analyzing these AI systems with a novel technology that allows automatized analysis and quantification.

Genetic relic of the 'black death' may offer clues in treating liver disease
A gene mutation that is believed to have safeguarded some people in 14th century Europe from the bubonic plague today may be protecting HIV patients co-infected with hepatitis C from potentially fatal liver scarring, says a University of Cincinnati (UC) College of Medicine physician-scientist.

UC researchers recommend universal screening to tackle rise in Hepatitis C
Physicians are encountering a growing number of younger patients who are testing positive for hepatitis C virus (HCV) fueled largely by the opioid crisis impacting communities around the country.

Using hepatitis C-infected donor kidneys could reduce time on dialysis for transplant patients with HCV
Transplanting hepatitis C-infected dialysis patients with HCV-positive donor organs and then treating the infection later is more effective, cheaper and shortens organ wait time.

Some of the world's poorest people are bearing the costs of tropical forest conservation
Researchers from Bangor University in the UK and the University of Antananarivo in Madagascar show that new conservation restrictions in Madagascar bring very significant costs to local people (representing up to 85 percent of local annual incomes).

Read More: Watermark News and Watermark Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to