Verisign is the Rolls-Royce of internet-security, a byword for integrity and assurance. Alongside its corporate domain-registry business, the internet-services firm offers protection against distributed denial of service (DDoS) attacks, in which zombie PC armies conscripted by malware clog up websites of corporations and other institutions.It provides so-called active-vulnerability monitoring, flagging up any threats to a business’s online presence. And it maintains the supposedly impregnable infrastructure to convert domain names ending in .com, .net and others into numbers that servers and computers can understand. Companies trust VeriSign to ensure that no one is messing with their internet plumbing.
http://www.economist.com/blogs/babbage/2012/02/internet-security
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