Bot nets likely behind jump in spam
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| A significant rise in the global volume of spam in the past two
| months has security analysts worried that bot nets are increasingly
| being used by spammers to stymie network defenses erected to curtail
| bulk email.
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| [...]
|
| Bots and bot nets have rapidly emerged as one of the major threats
| on the Internet. Tens of thousands of compromised PCs are frequently
| counted among a single bot net's unwilling members, with some bot
| nets boasting as many as a million systems. Traditionally, the
| networks have been used to install adware on victims' machines or
| level denial-of-service attacks at online companies as part of an
| extortion scheme.
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http://www.theregister.co.uk/2006/10/31/botnet_spam_surge/
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