The research indicated that quarter-on-quarter increase in security incidents is occurring at a 90 per cent compound annual growth rate. The MSN network was found to have experienced the largest number of incidents in both 2004 and 2005. For 2005, 57 percent of IM incidents targeted MSN, 37 percent targeted AOL, and 6 percent targeted Yahoo!. Year-on-year growth rates were largest on the AOL network with a 1,300 percent increase of security incidents.
2005 has been witness to a dramatic change in hacker attacks across multiple networks, as compared to the previous year, where security incidents primarily spread via one network only.