It’s worth pointing out that this eact same thing can happen with non-anonymous credentials (like usernames/passwords or session cookies) as well. However, there’s a difference. In the non-anonymous setting, credential cloning and other similar abuse can be detected, at least in principle. Websites routinely monitor for patterns that indicate the use of stolen credentials: for example, many will flag when they see a single “user” showing up too frequently, or from different and unlikely parts of the world, a procedure that’s sometimes called continuous authentication. Unfortunately, the anonymity properties of anonymous credentials render such checks mostly useless, since every credential “show” is totally anonymous, and we have no idea which user is actually presenting.
If you're wondering what it is about the Kindle Paperwhite Kids that makes it our favorite pick for youngsters, Mashable's Samantha Mangino says in our roundup of the best Kindles that "More than anything else, a Kindle for kids has to be waterproof, which is why the Kindle Paperwhite Kids is the best choice." That's certainly not all, though. Mangino also notes that, "what makes it great for kids is that it's a distraction-free device. It doesn't come with ads, notifications, or the temptation of games or video."
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第一节 扰乱公共秩序的行为和处罚