LinkedIn has also now jumped on the two-factor authentication bandwagon by offering the optional service to its 255 million users.
Those who opt in will have to enter their regular password, plus a numeric code that is sent to their phone via SMS every time they log in.
"Most Internet accounts that become compromised are illegitimately accessed from a new or unknown computer (or device)," LinkedIn's Vincente Silveira wrote in a blog post. "When enabled, two-step verification makes it more difficult for unauthorized users to access your account, requiring them to have both your password and access to your mobile phone."
Two-step verification can be activated via the LinkedIn Settings menu. Then lick the Account tab and the "Manage security" option.
The move comes about a year after the company was hacked, forcing the enterprise social network to reset the passwords of affected accounts. The company did not confirm how many passwords were involved, though it reportedly affected about 6 million users.
LinkedIn is not the only Internet service to have suffered a breach recently, prompting many of the tech world's biggest firms to implement optional, two-factor authentication.