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How can I stop someone else from using my Gmail account?

The Guardian

I think someone I know has hacked my Gmail account. This is a relatively common question. Other recent examples include "Someone is using my Gmail account to steal my data on a game. How do I get rid of him?" from Rodimus Ghost, and "My daughter is using my Gmail account. I don't recall getting these queries about other email services.

How to secure your Google account and keep it safe from attacks


If your online life revolves around Gmail, Chrome, and other Google software and services, your Google account is one of your most precious online resources. That's especially true if you use the Gmail address associated with that account as your primary email address. Simple steps can make the difference between losing your online accounts or maintaining what is now a precious commodity: Your privacy. An online criminal who gets hold of those credentials can cause chaos and do catastrophic damage to your online life, which is why it's important to protect your Google account from being compromised. In this post, I list seven steps you can take to help you lock that account down so it's safe from online attacks.

With a physical key, Google says it can protect you from nation-state hackers


But neither are biometrics, and every other "password killer" has largely fallen flat. With constant threats from hackers and scammers, and now even nation-state and government-backed attackers, the odds are stacked against Google users. Hackers only have to win once, and tech companies have to win every time. Now, the search giant thinks it can stop even the most sophisticated of hackers. Instead of doing away with the password for good, the search giant wants to give at-risk accounts a whole new layer of protection.

5 things you should know about two-factor authentication


One of the best pieces of security advice any computer expert can give you is to enable two-factor authentication for websites that support it. With password breaches so common nowadays, it could be the one thing that keeps hackers from stealing your identity online. Here are five points to help you understand this technology. A lot of people think they're the same thing, but that's not really accurate. There are three types of authentication factors: something you know, such as a password or PIN; something you have, such as a mobile phone or a special USB key; and something you are, such as your fingerprint or other biometric identifier.

How to lock down your Microsoft Account and keep it safe from outside attackers


If you use a Microsoft account to sign in to a Windows PC, that account and its associated email address should be the one you guard most jealously. That's especially true if you use that Microsoft account for OneDrive storage and Office 365 documents. In this post, I list seven steps you can take to help you lock that account down so it's safe from online attacks. As always, there's a balancing act between convenience and security, so I've divided the steps into three groups, based on how tightly you want to lock down your Microsoft account. Security settings for business and enterprise Microsoft 365 accounts are managed by domain administrators through Azure Active Directory, using a completely different set of tools.)