Jigsaw, Google Alphabet's incubator subsidiary, has launched a free online phishing quiz so users can test how well they can spot a malicious email message.

Justin Henck, Jigsaw product manager, said in a blog post today that the quiz was created from security training the company has held with 10,000 journalists, activists, and political leaders worldwide. "We've studied the latest techniques attackers use, and designed the quiz to teach people how to spot them," he said in the post.

Google considers two-factor authentication the best way to protect against phishing, he said. "When you have two-factor authentication enabled, even if an attacker successfully steals your password they won't be able to access your account," Henck said. "We also offer a Chrome extension called Password Alert that protects you from entering your Google password in a fake login page."

Take the Google Phishing Quiz here.