Identify the key to be deleted: Within this section, you will see a list of your added SSH keys. Look for the specific key you want to remove and take note of the associated title or description. Sometimes the TPM drive can get outdated or corrupted, triggering the TPM issues. So, we recommend you updated or reinstall the TPM driver on Windows 10/11 and see if it works.

In addition, you need to make sure that your computer hardware contains a Unified Extensible Firmware Interface (UEFI) that is Trusted Computing Group-compliant. Unless I'm misunderstanding, you lost your .ssh directory containing your private key on your local machine and so you want to remove the public key which was on a server and which allowed key-based login. First, you need to locate the necessary SSH key you wish to delete. SSH keys are stored in the `~/.ssh` directory, and they usually come in pairs – a private key with the `.pem` or `.key` extension and a public key with the `.pub` extension. The private key should be kept secret, while the public key can be shared with others. Before diving into the actual deletion process, let’s discuss the reasons why you might want to delete an SSH key. Typically, it could be due to one of the following reasons: I am ready to do a clean install of Windows 10 x64 in UEFI mode enabling all the latest mod cons. I want to clear out all my keys and just have whatever is supposed to be there for Win10. Is this what deleting all my keys will do or will it make one big mess?In addition, it will delete all data protected by these TPM-relevant keys, such as a sign-in PIN, virtual smart card, etc. If you want to clear TPM safely, it’s important to pay heed to the following things: The process of deleting a public key varies depending on the setup. If the key was added to your local SSH agent, you’d need to remove it from there. If the key was added directly to the remote host, you’ll have to delete it from the authorized keys file on the host. In case this helps anyone: I even tried deleting the id_rsa and id_rsa.pub files altogether, and the key was still showing up.

Press Shift in combination with a letter to type an uppercase letter. Press Shift in combination with another key to type the symbol shown on the upper part of that key. This command will first find the public key within the authorized keys file, then create a temporary file without that key, and finally replace the original authorized keys file with the new one. Once engaged, the only difference users may notice is that the operating system’s boot-up procedure is slightly slower than before. Step 1. Start your computer, and then hold the F2 and Delete hotkey before the computer is booted. By doing so, you will enter BIOS.With the object highlighted, press shift + f10 (function key f10). Press the arrow keys to move through the menu. If you have added the key to your local SSH agent, you can remove it using the `ssh-add` command with the `-d` flag. Here’s the command you would use, replacing `my_key.pub` with your public key file: This command will delete the specified public key from your SSH agent, ensuring that it does not get accidentally used for future connections. It subverts the normal operation of ssh-agent, mostly just so that it can pop up a pretty box into which you can type the passphrase for an encrypted ssh key.

https://answers.microsoft.com/en-us/windows/forum/all/clearing-tpm/ee0e984c-db00-4d78-be09-f4410f7149c2 What Is TPM In certain cases, you may be asked to confirm your decision to clear the TPM by the UEFI. All you will have to do is press a button while the computer is restarting.Your computer will automatically restart after the process is done. During the restart, you might be prompted by the UEFI to press a button to confirm that you wish to clear the TPM.

This key is rarely used. In some older programs, pressing this key pauses the program or, in combination with Ctrl, stops it from running. To permanently delete the identified key, use the rm command followed by the file name. For example, if the key to be deleted is named id_rsa.pub, use the following command:

Comment out the key by adding a “#” symbol at the beginning of the line containing the key. This will prevent the SSH server from recognizing the key, effectively revoking it. As long as the computer is not in a trustworthy condition, it will not boot, which means that there will be no way to access or extract any data from it. Remember that by deleting an SSH key, you will lose access to any repositories or services that require it for authentication. Be sure to obtain a new SSH key and update your repositories’ access settings accordingly if necessary. How can you permanently delete an SSH key from a server using command line methods?