Quick Answer: How Do I Protect My SSH Key?

Are SSH keys protected with a passphrase or a password?

Protecting SSH keys The SSH keys themselves are private keys; the private key is further encrypted using a symmetric encryption key derived from a passphrase..

How do I create a new SSH key?

Generating an SSH keyOpen the PuTTYgen program.For Type of key to generate, select SSH-2 RSA.Click the Generate button.Move your mouse in the area below the progress bar. … Type a passphrase in the Key passphrase field. … Click the Save private key button to save the private key.More items…•

How many SSH keys should I have?

The public key of each user is stored on the ssh-server (host). This allows to authenticate the user because for each public key there should be only one private key.

How often should SSH keys be changed?

5 Answers. Yes, strictly speaking it is recommended to expire SSH keys after a while (this could depend of the key length, vulnerabilities found in the key generator, etc.). However such mechanism was not foreseen by SSH. And it is cumbersome to go to every possible remote hosts and delete the public key.

How do I protect my SSH private key?

Everyone recommends that you protect your private key with a passphrase (otherwise anybody who steals the file from you can log into everything you have access to). If you leave the passphrase blank, the key is not encrypted.

How do I protect my private key?

Use Physical Security to Protect Keys — Protect private keys with cryptographic hardware products that meet the minimum of FIPS 140-2 Level 2 certified. Cryptographic hardware does not allow export of the private key to software where it could be attacked.

Should I reuse SSH keys?

4 Answers. Your private key is never sent to the other site so it’s perfectly safe to reuse the public key. It’s also OK to reuse the same key your local computers. However, bear in mind that if someone steals the key, they then have access to all of them.

Are SSH keys tied to user?

2 Answers. The public key is placed into the home directory of the user on the server who used ssh-keygen and ssh-copy-id to generate it and put it there. If you use ssh to connect to the machine with no username, it will attempt to connect with the username of whoever is logged in.

Does SSH key expire?

Traditional SSH keys have no expiry; in fact they have no metadata whatsoever (except maybe a comment field). … For example, if your public key starts with “ssh-rsa-cert-v01@openssh.com” instead of the usual “ssh-rsa”, then it is a certificate with metadata – expiry date possibly included.

How do I use an old SSH key?

If you have a copy of your ssh keys (e.g., on a USB stick) then simply copy the key files to the ~/. ssh/ directory. Otherwise, you will need to create a new one and add it to your GitHub account https://help.github.com/articles/adding-a-new-ssh-key-to-your-github-account/.

Where should I save my SSH key?

Nothing wrong with storing your keys in your ~/. ssh because thats default. Just make sure you backup your /home. Also make sure you follow good password standards and your folder/file permissions are set right.