Internet users are urged to change passwords to avoid any personal information being stolen by the recent Heartbleed bug.
This bug is being called the worst the Internet has ever seen, exploiting a hole in the encryption software that many websites use.
Information that is vulnerable includes passwords, usernames, email exchanges and instant messages.
Most websites have patched the security gap; on these safe sites, the next step is to change passwords. For sites that have not yet been marked as safe, log out of accounts and wait for the sites to be updated.
The safe sites include Google, Facebook, Instagram, Amazon, Netflix, Wikipedia, Yelp and more.
Warnings advise that users make sure each site is safe before changing passwords, to avoid the new passwords being compromised.