Expedia’s Trip Advisor, email marketing provider Epsilon, Sony’s online entertainment services, professional engineering society Institute of Electrical and Electronics Engineers. They all suffered some kind of a data breach in the first four months of 2011. At one point, it seemed like there was at least one new security breach being reported every week. Here are eWeek's 10 biggest data breaches of 2011 to date.
1. Sony’s PlayStation Network, Qriocity, Sony Online Entertainment