The cyber attacks on major websites have sent shockwaves through the internet. BBC News Online looks at what happened and its repercussions.

Attacks in cyberspace

FBI chief warns of cyber crime threat
Cyber-crime poses a significant threat to national and economic security in the US, FBI director Louis Freeh warns after cases more than double in a year.

Hacker inquiry leads to Germany, 13 Feb

Cyber attacks traced to California, 12 Feb

US combats cyber attacks, 11 Feb

US pledges net safety measures, 10 Feb

Internet sabotage spreads, 9 Feb

Yahoo brought to standstill, 8 Feb

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The vulnerable internet

How the web was wounded
The electronic assaults have illustrated how vulnerable to attack even the internet's biggest names are.

Security answers to cyber attack

Beating the hacker attack

Yahoo attack exposes web weakness

Can the internet ever be secure?

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The world of the hacker

Hackers slam 'web vandals'
The hacking community has viewed the attacks on the websites with disdain, seeing those behind them as "script kiddies".

A - Z: Hack attack

Cracking: Hackers turn nasty