If you have an account at a major bank, chances are you may have been put at risk for identity theft, according to members of the Merchants Identity Theft Advisory Board. “All of the large banks have been victims of data breaches,” said Russell Johnson, an identity theft expert and member of the board. The Wall Street Journal reported an attack on Citigroup by hackers linked to a Russian gang last month. In September, Chase Bank sent letters to customers informing them a computer tape containing customers’ personal information went missing.