One of the most important countermeasures against credential abuse is the ability to ban users who behave badly. This sort of revocation happens all the time on real sites: for example, when a user posts spam on a website, or abuses the site’s terms of service. Yet implementing revocation with anonymous credentials seems implicitly difficult. In a non-anonymous credential system we simply identify the user and add them to a banlist. But anonymous credential users are anonymous! How do you ban a user who doesn’t have to identify themselves?
Navigate to the "My Account" section in the top right and select "Settings"
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In the next part of the piece I’m going to try to make this all much more concrete, by looking at two real-world examples: PrivacyPass, and a brand-new proposal from Google to tie anonymous credentials to your driver’s license on Android phones.
Марина Совина (ночной редактор)
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