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Фото: Andrey Titov / Globallookpress.com
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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?
Фото: Jacek Marczewski/Agencja Wyborcz / Reuters，详情可参考Line官方版本下载
云耀深维创始团队认为，金属3D打印要实现真正的批量生产，必须提升原生打印的精度及表面质量，只有当精度足以逼近净成形、后处理不再是漫长的“手工作坊”式劳作时，金属增材制造才能在成本与效率上与传统精密加工展开正面对决，从而进一步叩开规模化工业应用的大门。
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