Online poker forum Two Plus Two was recently shut down after a hacker demonstrated the ability to access members' e-mail addresses and encrypted passwords, along with the ability to decrypt those passwords.

"While it is unclear the extent of data to which he gained access, e-mail addresses and passwords on the Two Plus Two forums should be considered compromised," a statement reads. "If you have used your 2+2 password on any other site, you are advised to change it. For your security, we are closing the forums until the breach is patched. Upon reopening the forums you will be forced to change your password – it is counterproductive to do so now."

"Like many other Two Plus Two members I use the same password for a whole host of sites, or at least I used to do," writes PokerNews' Matthew Pitt. "As my online poker site and bank both have RSA tokens attached to them I was not overly worried and did not change the password associated with these accounts until this morning. But if you use the same email / password combination for any other site that you use for the Two Plus Two forums then you must change your passwords immediately because there is a significant chance that the hacker has all of your details to hand."

"TwoPlusTwo is the most sought after online poker forum when it comes to poker-related news, advice, tips, scandal, and gossip, so it comes as no surprise that this has jolted the poker community into an upset," Online Poker News reports.