Alberta Information and Privacy Commissioner Frank Work says Sony Playstation users should change their passwords and possibly cancel their credit cards in light of this month's security breach.

"Even though Sony says credit card numbers were encrypted, if you are worried about credit card issues because of this breach, cancel your card and get a new one," Work said Friday in a news release.

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Alberta Privacy Commissioner Frank Work. CBC (CBC)

Work says users should change all their passwords since it's possible hackers could break into their other online accounts.   

Work is also warning people to be suspicious of possible email phishing scams.

Sony won't be sending emails to users of the system, so if you get one purported to be from Sony, delete it immediately, Work says.

Sony said the account information of 77 million users was compromised by hackers this month.