It seems that
this announcement is a little too late since the breech occurred in 2014.
However it is a good reminder to be diligent with your personal
information including passwords. Stolen information included names, email addresses, telephone numbers, dates of birth, hashed passwords (the
encrypted password stored on your computer).
This hack likely occurred when Yahoo
servers were compromised and data was transferred to a rouge third
party. There is no way for a Yahoo user to protect against this
type of hack.
However, they can also hack a user
computer using similar methods. This type of attack can be
minimized by the user by having proper malware and antivirus protection
on their computer.
When your account is hacked, immediately
change the password. Use a technically complex password with
minimally having at least 8 characters, an upper case letter, a lower
case letter, a number and a special character. Preferably do not use a
password found in the dictionary. A random selection of characters
is best but is difficult to remember. Secondly, scan you computer
with Malwarebytes anti-malware and remove all infected objects.