Yahoo! has revealed that Yahoo! Mail was the target of a cyber attack. Yahoo! provided the following announcement to help users understand the attack:
What we’re doing to protect our users:
We are resetting passwords on impacted accounts and we are using second sign-in verification to allow users to re-secure their accounts. Impacted users will be prompted (if not, already) to change their password and may receive an email notification or an SMS text if they have added a mobile number to their account.
We are working with federal law enforcement to find and prosecute the perpetrators responsible for this attack.
We have implemented additional measures to block attacks against Yahoo’s systems.
If you want to feel more secure about your Yahoo! Mail, here is a guide to changing your Yahoo! Mail password.
1. Visit Your Yahoo! Account Info Page
Go to your Yahoo! Account Info page. If you don't know where to find that page, this Yahoo! Help tutorial will provide you with the link.
2. Log in When Prompted
You may be prompted to sign in before you can access your Account Info page. Simply fill in your Yahoo! ID and password, or click on the links lower on the screen to sign in with Google or Facebook instead.
3. Go to 'Sign-In and Security'
After you sign in, you'll see a page that looks a lot like the image above. Under "Sign-In and Security," click on "Change your password."
4. Enter Your Current Password and Your New Password, Then Hit Save
— Kaspersky Lab (@kaspersky) January 30, 2014
Yahoo! suggests that your new password should contain different variations of symbols and characters. Don't use a password that use already use for another website. Change your password periodically to minimize your vulnerabilities.
5. You've Successfully Changed Your Password
— Yahoo Customer Care (@YahooCare) January 27, 2014
Your password should now be changed. Now would be a good time to update your alternate email address or mobile phone number, which will allow you to recover your forgotten passwords in the future, or verify your identity.
If you have difficulty completing the steps above, Yahoo! instructs you to contact Yahoo! Customer Care.