Yahoo! Inc.’s disclosure of a billion-account data breach—its second major breach revelation in three months—will increase the likelihood of regulators taking public data security enforcement action, privacy and security professionals said Dec. 15.

Edward J. McAndrew, a cybersecurity partner at Ballard Spahr LLP in Philadelphia, told Bloomberg BNA that it would be “very surprising if Yahoo’s data security practices did not attract the attention of various regulators here and abroad, beginning with the Federal Trade Commission.”

The FTC, state attorneys general and international privacy regulators will want to “investigate how Yahoo failed to secure the personal data of at least 1.5 billion” accounts over such a long period of time, McAndrew said.

Source: Yahoo Billion Account Breach May Push Enforcement