defacement

One non-e-mail context in which hashcash appears to be a good solution is in the rather spam-like defacement that Wikis sometimes suffer.

Wiki有时会遭遇到与垃圾邮件十分类似的破坏，bashcash在非电子邮件上下文中似乎是一个不错的解决方案。

The defacement or destruction of public or private property.

损坏或破坏公私财产的。

Adding a hashcash challenge does not prevent automated defacement of Wiki sites, but it can make a vandalbot crawl much more slowly.

添加hashcash质询并不能防止对Wiki站点的自动破坏，但是它可以使破坏行为变得更慢。

Standard Test Method for Determining the Resistance of Paint Films and Related Coatings to Algal Defacement

测定漆膜及有关涂层耐海藻损坏的标准试验方法