E-mail addresses and dates of birth may have been stolen following an attack on Sega Pass database. Payment information, such as credit card numbers, remained safe. Lulz Security appeared to deny involvement in the attack, despite leading a wave of recent cyber attacks. No hacker group has claimed responsibility for the attack so far, but the hacking group LulzSec has denied the credit for any of the recent attacks on game companies and their online services are credited with the attacks on LulzSecurity.
Source: https://thehackernews.com/2011/06/sega-pass-customer-datails-hacked.html