Is SSH key specific to user?

  May 29, 2021
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Is SSH key specific to user?

The short answer is no. Sample scenario: you (Bob) want to connect to remote host ( earth ) as alice . SSH is a connection from someplace (a Unix, Windows, tablet.) to a user ( alice ) on a host ( earth ). When you ( bob ) connect without password, you use a private key (on Unix it is traditionally located in ~/.

Can a user have multiple SSH keys?

Yes, it’s possible for a single user to accept multiple public SSH keys. The text of the key files all have to be copied into /home/deploy/. ssh/authorized_keys (deploy was the user in the above example).

How do I generate a SSH key for a different user?

Answer

  1. Login as the user for which the SSH key is to be generated.
  2. To generate an RSA ssh key, issue the command: ssh-keygen -t rsa.
  3. Respond to prompts from the ssh-keygen command, which generates an SSH key in ${HOME}/.ssh (unless the user specified a different directory)

Is it okay to share public SSH key?

Since it’s a public key it isn’t meant to be encrypted, it only allows to authentify your private key (which should never be shared publicly) so yes you can send it via email.

Is public key user specific?

Unlike the commonly known (symmetric or secret-key) encryption algorithms the public key encryption algorithms work with two separate keys. These two keys form a pair that is specific to each user.

Should I have different SSH keys?

As far as security is concerned, you don’t compromise your key in any way by using it to log in on a machine (as you would by using a password), so having separate keys for separate destinations doesn’t make you any more safe from an authentication/security perspective.

Do I need more than one SSH key?

You use SSH for connecting to remote servers, which also includes managing your code using Git and syncing with remote repositories. Even though it is considered a good practice to have one private-public key pair per device, sometimes you need to use multiple keys and/or you have unorthodox key names.

How do I copy a SSH key to another user in Linux?

1 Answer

  1. Create the folder if it doesn’t already exist: mkdir /home/$USER/.ssh.
  2. Make the directory only executable by the user: chmod 700 /home/$USER/.ssh.
  3. Copy the authorized_keys file that contains your public key:
  4. Make everything in .ssh owned by your user:
  5. Make it readable only by your user:

Can SSH key be hacked?

Activity reported by web servers has proven attackers are exploiting SSH Keys to gain access to company data. Attackers can breach the perimeter in a number of ways, as they have been doing, but once they get in, they steal SSH Keys to advance the attack. SSH Keys quietly connect every business environment.

Is SSH public key secret?

SSH key pairs are two cryptographically secure keys that can be used to authenticate a client to an SSH server. Each key pair consists of a public key and a private key. The private key is retained by the client and should be kept absolutely secret.

What is SSH public key?

An SSH key is a secure access credential used in the Secure Shell (SSH) protocol. SSH keys use key pairs based on public key infrastructure (PKI) technology, the gold standard for digital identity authentication and encryption, to provide a secure and scalable method of authentication.