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The Wayback Machine - http://web.archive.org/web/20220204103634/https://docs.github.com/en/authentication
 
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Authentication

Account security

Authentication to GitHub
Create a strong password
Update access credentials
Create a PAT
Reviewing your SSH keys
Deploy keys
Authorizing OAuth Apps
Authorizing GitHub Apps
Authorized integrations
Third-party applications
Review OAuth apps
Token expiration
Security log
Remove sensitive data
About anonymized URLs
GitHub's IP addresses
SSH key fingerprints
Sudo mode
Unauthorized access

Secure your account with 2FA

About 2FA
Configure 2FA
Configure 2FA recovery
Access GitHub with 2FA
Recover an account with 2FA
Change 2FA delivery method
Countries supporting SMS
Disable 2FA

Connect with SSH

About SSH
Check for existing SSH key
Generate new SSH key
Add a new SSH key
Test your SSH connection
SSH key passphrases

Troubleshooting SSH

Use SSH over HTTPS port
Recover SSH key passphrase
Deleted or missing SSH keys
Permission denied (publickey)
Error: Bad file number
Error: Key already in use
Permission denied other-user
Permission denied other-repo
Agent failure to sign
ssh-add: illegal option -- K
SSL certificate problem
Error: Unknown key type
SSH key audit

Verify commit signatures

Commit signature verification
Displaying verification for all commits
Existing GPG keys
Generating a new GPG key
Add a new GPG key
Tell Git your signing key
Associate email with GPG key
Signing commits
Signing tags

Troubleshoot verification

Check verification status
Update expired GPG key
Use verified email in GPG key


Authentication
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GitHub Docs

Authentication

Authentication

Get started
Account and profile
Authentication
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GitHub Issues
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GitHub Pages
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CodeQL
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Authentication

Keep your account and data secure with features like two-factor authentication, SSH, and commit signature verification.

Keeping your account and data secure

To protect your personal information, you should keep both your account on GitHub.com and any associated data secure.

Securing your account with two-factor authentication (2FA)

You can set up your account on GitHub.com to require an authentication code in addition to your password when you sign in.

Connecting to GitHub with SSH

You can connect to GitHub using the Secure Shell Protocol (SSH), which provides a secure channel over an unsecured network.

Troubleshooting SSH

When using SSH to connect and authenticate to GitHub, you may need to troubleshoot unexpected issues that may arise.

Managing commit signature verification

You can sign your work locally using GPG or S/MIME. GitHub will verify these signatures so other people will know that your commits come from a trusted source. GitHub will automatically sign commits you make using the GitHub web interface.

Troubleshooting commit signature verification

You may need to troubleshoot unexpected issues that arise when signing commits locally for verification on GitHub.

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