The hacker group, Lulz Security, has admitted to breaking into the Sony Network and stealing over one million passwords, email addresses and other information.
Lulz Security said it broke into servers that run SonyPictures.com.
"From a single injection, we accessed everything. Why do you put such faith in a company that allows itself to become open to these simple attacks? What's worse is that every bit of data we took wasn't encrypted. Sony stored over 1,000,000 passwords of its customers in plain text, which means it's just a matter of taking it", the BBC quoted a Lulz security statement, as saying.
Sony said it was aware of Lulz Security's statement and is investigating the theft.The company has estimated that the data breach will affect its operating profit by 170 million dollars (104 million pounds).
The earlier attack on Sony's PlayStation network in April was considered the biggest in internet history and led to Sony shutting down PlayStation network and other services for almost a month.