> It is believed that the hack compromised personal data from the accounts including names, email addresses, telephone numbers, dates of birth, hashed passwords

> It is believed that the hack compromised personal data from the accounts including names, email addresses, telephone numbers, dates of birth, hashed passwords (the majority with bcrypt) and, in some cases, encrypted or unencrypted security questions and answers. https://en.wikipedia.org/wiki/Yahoo!_data_breach https://en.wikipedia.org/wiki/Yahoo!_data_breach i.e. messages weren't stolen, account information was.