The discovery of the Heartbleed computer bug has led regulators to raise alarms over the effect of cybersecurity threats on consumer confidence. The Financial Stability Oversight Council's 2013 annual report highlighted that in the prior year more than a dozen financial institutions "were subject to sustained and persistent cyberattacks." Thomas Curry, head the Office of the Comptroller of the Currency, noted the financial sector is one of the most attractive targets for cyberattacks. It is increasingly dependent on technology--often provided by third-party vendors, creating additional potential entry points for attacks. As the biggest banks build defenses, attackers may target the less sophisticated barriers of smaller banks, Curry said.