The database of the includes customer names, dates of birth, e-mail addresses and encrypted passwords.

Various media outlets have been able to confirm the attack with officials from the Japanese company. The news site Playstation Lifestyle that Sega reportedly sent to Sega Pass registered users on Friday night informing them of the breach.

In the letter, Sega stresses that passwords weren't stored in plain text, but rather encrypted, and that payment information wasn't involved in the incident.

Still, the company recommends that people who use the same e-mail/password combination to access other websites that they used for Sega Pass proactively change those passwords.

Customers should also be on the lookout for suspicious communications asking for personal information, as they may be attempts to involve them in fraudulent transactions using the compromised information, the company said in the letter.