On average company lost $526,000 after a security breach in 2005

Computer Security Institute found that the average dollar amount pegged to a security breach fell by 61% compared to 2004, when the loss per polled company or government agency was estimated at $526,000. In 2005, the amount per respondent was only $203,000. In 2001, DoS attacks were experienced by over 90% of those polled; in 2005, fewer than 50% said they'd been the victim of a DoS attack in the last 12 months.