‘At least’ 500M Yahoo accounts breached

Yahoo has confirmed a data breach “associated with at least 500m user accounts.”
A statement from CISO Bob Lord said a copy of certain user account information was stolen in late 2014 by what Yahoo believes is a state-sponsored actor.
That account information potentially includes names, email addresses, telephone numbers, dates of birth, hashed passwords and encrypted and unencrypted security questions and answers. Yahoo said its investigation suggests the information did not include