GitHub requires a password to perform sensitive actions, such as adding new SSH keys, authorizing applications, or modifying team members.
After changing your password, you should perform these actions to make sure that your account is secure:
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Enable two-factor authentication on your account so that access requires more than just a password. For more information, see About two-factor authentication.
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Add a passkey to your account to enable a secure, passwordless login. Passkeys are phishing-resistant, and they don't require memorization or active management. See About passkeys.
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Review your SSH keys, deploy keys, and authorized OAuth apps and GitHub Apps and revoke unauthorized or unfamiliar access in your SSH and Applications settings. For more information, see Reviewing your SSH keys, Reviewing your deploy keys, Reviewing your authorized OAuth apps, and Reviewing and revoking authorization of GitHub Apps.
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Review your account's security log. This provides an overview on various configurations made to your repositories. For example, you can ensure that no private repositories were turned public, or that no repositories were transferred. For more information, see Reviewing your security log.
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Review the webhooks on your repositories. Webhooks could allow an attacker to intercept pushes made to your repository. For more information, see About webhooks.
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Make sure that no new deploy keys were created. This could enable outside servers access to your projects. For more information, see Managing deploy keys.
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Review recent commits made to your repositories.
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Review the list of collaborators for each repository.