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A necklace of diamonds that has no visible meaning is often mistaken for a mysterious pearl necklace.
But the object itself is actually an embedded digital image of a diamond, which is encoded in a silicon chip, creating a new way to unlock a digital wallet.
“We’ve got a way of turning a digital signal into a digital object, so it’s not just a digital image, but it’s a digital code,” said Prof. Peter Wirth of the University of Technology Sydney.
A new study of the chip showed that the necklace was actually a digital fingerprint, and that a digital algorithm could identify it.
Prof Wirth’s team created a 3D image of the diamond chip and attached it to a ring, and it turned out to be a digital photograph.
The picture was embedded in the chip and the algorithm identified the fingerprint by matching it with a database of more than 3 million digital photos.
A fingerprint can be read by a computer, but the process can be slow, and even with sophisticated hardware, the algorithm is still susceptible to random errors, the researchers said.
The chip also contains an algorithm to identify a digital picture of a stone, called a “digital fingerprint”, the researchers wrote in a paper published in the journal Science.
“There is no magic to the way the fingerprint is stored on the chip,” Prof Wuth said.
“But this is an important step towards creating digital signatures that can be easily and cheaply verified.”
“It’s a big deal that we can now produce a digital signature that can reliably verify the integrity of a digital document,” he said.
A chip with a digital print of a person’s signature can be used to unlock an electronic wallet.
The researchers used a device that can decode fingerprints, a method that is now commonly used by companies such as Apple, Google, and Visa.
Prof Krikorian said the chip could be used by people to create digital identities and identities for people, rather than for digital objects.
The study was a collaboration between researchers from the University and the University College London.
The project was funded by the National Science Foundation.
The work was presented at the 21st Conference on Security and Privacy in Las Vegas, and was published in Science Advances.
The University of Sydney’s Dr David Tarr, an expert in computer vision, said the technique could potentially enable the creation of new digital identities.
“It could enable anyone to create a digital identity that they can use for digital things, like passwords, or even passwords,” he told ABC Radio Melbourne.
“What I’ve always found exciting about this is that it’s so much easier to use than people think, which makes it an exciting avenue to go.”
The researchers say the technology could also be used for identity theft and identity verification, although it would not be practical to do that for everyday transactions, Prof Wory said.
But there is one major limitation, the paper notes: the chip is only able to generate one digital fingerprint at a time.
That means it’s possible that a person could use the chip to create an entirely different digital fingerprint.
Prof Tarr said there is a growing interest in developing a way to create two fingerprints simultaneously.
But it would take at least a decade to make that possible, and the researchers say they would be willing to give up on that.
“I don’t think it’s feasible to do it,” Prof Terr said.