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?
This gives us everything from the first command (5 + 5) to the marker printing (putStrLn "---Marker-1---"). So now the problem boils down to separating all the stuff we input to GHCi vs the stuff it outputs.
，这一点在体育直播中也有详细论述
Мария Большакова (редактор отдела «Интернет и СМИ»)
Why did US and Israel attack Iran and how long could the war last?，详情可参考服务器推荐
Source: Computational Materials Science, Volume 268，详情可参考体育直播
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