Many current computer systems have only limited security precautions in place.
Serious financial damage has been caused by computer security breaches, but reliably estimating costs is quite difficult.
Figures in the billions of dollars have been quoted in relation to the damage caused by malware such as computer worms like the Code Red worm, but such estimates may be exaggerated.
However, other losses, such as those caused by the compromise of credit card information, can be more easily determined, and they have been substantial, as measured by millions of individual victims of identity theft each year in each of several nations, and the severe hardship imposed on each victim.
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