New Books in Science cover image

Jaap-Henk Hoepman, "Privacy Is Hard and Seven Other Myths: Achieving Privacy Through Careful Design" (MIT Press, 2021)

New Books in Science

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Is Your Name in a Coin?

Most of the current electronic payment schemes by by credit card, or if you use a payment card, are traceable. So every transaction can, in principle, be linked to you. If money is only a bit string on your computer, it's easy to copy wrigt. How do you prevent this copying? The easy way to do that is to link these things to an account. But then the money becomes traceable. David Cham invented a kind of digital money called 'thes ittl coins' He could embed your name in a coin in such a way that if you only spend it once, your name is private,. But if you spend the same coin twice, your

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