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A group of computer scientists, including Claude Crépeau of McGill University and colleagues of physicists at the University of Geneva, developed an extremely secure authentication method based on the basic principle that the speed of information cannot exceed the speed of light
Crépeau, a professor in the School of Computer Science at McGill University, said: “Faced with fake tellers that store users’ personal identification codes, the current identification scheme using personal identification codes (pin) is very insecure
How to prove that you know something without revealing what you know
The new method published in the journal Nature is an advancement in the concept of zero-knowledge proof.
In the 1980s, the idea of zero-knowledge proof began to dominate the field of data encryption
Separate the witnesses and make things clear
The McGill-Geneva research team redefines the idea of zero-knowledge proof by creating a system that includes two physically separated verifier-verifier pairs
“The verifier randomly selects a large number of pairs of adjacent shapes in the image, and then asks each pair of verifiers for the color of one or the other,” explains co-author Hugo Zbinden, associate professor of applied physics at the University of Geneva
If two verifiers unanimously say different colors in response, the verifier can be sure that the two verifiers actually know the three-color solution
"It's like the police interrogating two suspects at the same time in different offices," Zbinden said
Paper: Pouriya Alikhani et al.
DOI: https://doi.
See also
Gilles Brassard's "Theory of Relativity Can Ensure the Safety of ATMs" in "Nature: News and Opinions"
DOI: https://doi.
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Magazine
nature
DOI
10.
Article title
Zero-knowledge proof of experimental relativity
Article publication date
3-November-2021
