If you want to use the same ssh key for both authentication and signing, you need to upload it twice. If you don't have an existing gpg key, you can generate a new gpg key to use for signing commits and tags. You can connect to github using the secure shell protocol (ssh), which provides a secure channel over an unsecured network.
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About passphrases for ssh keys with ssh keys, if someone gains access to your computer, the attacker can gain access to every system that uses that key
To add an extra layer of security, you can add a passphrase to your ssh key
To avoid entering the passphrase every time you connect, you can securely cache the key in the ssh agent. About authorization of ssh keys you can authorize an existing ssh key, or create a new ssh key and then authorize it Deploy keys you can launch projects from a repository on github.com to your server by using a deploy key, which is an ssh key that grants access to a single repository Github attaches the public part of the key directly to your repository instead of a personal account, and the private part of the key remains on your server.
About ssh keys you can use ssh to perform git operations in repositories For more information, see about ssh If you have an existing ssh key, you can use the key to authenticate git operations over ssh Checking for existing ssh keys before you generate a new ssh key, you should check your local machine for existing keys.
