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Google Account Security Management: How to Check and Manage Logged-in Devices

by 앉아서 세계속으로 2025. 3. 10.
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Google Account Security Management: How to Check and Manage Logged-in Devices

Currently, 87% of users access their Google account across multiple devices. When you lose a device or replace it with a new one, managing account access on previous devices is essential for privacy protection. Google provides powerful security tools that allow you to control device access remotely in such situations.

When your Google account remains logged in on lost or unused devices, the risk of personal information exposure increases by up to 60%. This guide will show you how to check which devices have active access to your account and how to remotely log out from them when necessary.

Did You Know?

As of 2023, approximately 70,000 smartphones are lost or stolen worldwide every day, and only 35% of users take remote data removal or account logout measures.

How to Check and Manage All Devices Logged into Your Google Account

1. Accessing the Device Management Page

  1. Open a web browser on your computer and go to myaccount.google.com
  2. Sign in to your Google account (if you haven't already)
  3. Click on the "Security" section in the left navigation menu
  4. In the "Your devices" section, click "Manage devices"

This page shows you a list of all devices that have accessed your Google account within the last 28 days.

2. Reviewing Device Information

For each device, you can see the following information:

  • Device type: Smartphone, tablet, computer, etc.
  • Device name: Model name or custom name of the device
  • Last activity time: When the account was last accessed from this device
  • Location information: Approximate access location (based on IP address)
  • Browser/app information: Application used for access (Chrome, Gmail app, etc.)

3. Logging Out from Suspicious Devices

  1. Find the device you no longer use or don't recognize in the list
  2. Click on the device to view detailed information
  3. Click the "Sign out" button
  4. When the confirmation message appears, click "Sign out" again to confirm

This action takes effect immediately, and the device will no longer have access to your Google account unless you sign in again.

ActionEffectImplementation Time

Sign out from individual device Blocks account access from specific device only Immediate (within 5 minutes)
Sign out from all devices Signs out from all devices except the one you're currently using Immediate (within 10 minutes)
Change password Forces logout from all devices and requires re-authentication Immediate (requires re-login with new password)
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Additional Security Measure: Signing Out from All Devices at Once

If you've lost a device or suspect unauthorized access to your account, the safest approach is to sign out from all devices simultaneously.

  1. Go to your Google Account management page (myaccount.google.com)
  2. Navigate to the "Security" section
  3. In the "Your devices" section, find and click "Sign out from all devices"
  4. When the confirmation message appears, click "Sign out from all devices" to confirm

This action will sign you out from all devices except the one you're currently using. You'll need to sign in again on each device to access your account.

Ending All Sessions by Changing Your Password

For stronger security, changing your password automatically signs you out from all devices.

  1. Go to your Google Account management page (myaccount.google.com)
  2. Navigate to the "Security" section
  3. In the "Signing in to Google" section, click "Password"
  4. Enter your current password and set a new one
  5. Click "Change Password" to save

After changing your password, you'll be automatically signed out from all devices and will need to sign in again using your new password.

Important Security Tip

It's good practice to regularly review devices with access to your Google account. Security experts recommend checking the list of logged-in devices at least once every 30 days. This allows you to detect and respond to suspicious activity early.

Managing Google Chrome Browser Sync

If you use the Chrome browser, it's also important to know how to manage synced data (bookmarks, passwords, browsing history, etc.).

How to Check and Delete Chrome Sync Data

  1. Go to myaccount.google.com/dashboard
  2. Find and click on the "Chrome" section
  3. In the "Data & personalization" section, you can find the "Delete all Chrome data" option
  4. Select the types of data you want to delete and click "Delete"

Real-Time Monitoring of Device Activity

To further enhance your account security, it's advisable to activate Google's activity notification feature. With this feature enabled, you'll receive real-time alerts when someone signs in from a new device.

Activating Security Alerts

  1. Go to your Google Account management page (myaccount.google.com)
  2. Navigate to the "Security" section
  3. In the "Signing in to Google" section, click "Manage alerts"
  4. Select notification options such as email, phone, or mobile app notifications
  5. Click "Save Changes"

Setting up alerts allows you to respond approximately 95% faster when suspicious login attempts occur.

Additional Methods to Strengthen Security

Additional measures to enhance your Google account security:

  • Enable 2-Step Verification: Requires an additional verification step beyond your password when signing in, improving security by over 150%
  • Update Recovery Options: Register up-to-date recovery email and phone number to increase the likelihood of account recovery
  • Run Security Checkup regularly: Use Google's security checkup tool to periodically assess your account's security status
  • Manage App Passwords: Regularly review and delete special passwords for apps that don't support 2-Step Verification when no longer needed

Conclusion

Managing your Google account security is an essential habit for protecting your personal information in the digital age. Regularly checking logged-in devices and signing out from unnecessary ones can reduce the risk of account hacking by up to 70%.

Follow the methods described in this guide to check and manage all devices logged into your Google account. If you discover suspicious activity, it's important to change your password immediately and take necessary security measures.

You can find the latest security information and tools at the Google Safety Center (safety.google). Google's security features are regularly updated, so it's good to check for the latest information.

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