The standard procedure for creating a Secure Shell public/private key pair follows. For information on additional options, see ssh-keygen(1).
To generate key pair just use New-SelfSignedCertificate cmdlet, then you can use generated certificate to encrypt/decrypt data using Protect/Unprotect-CmsMessage (this is PGP-like cmdlets, meaning you don't have to deal with symmetric key part yourself). Then to share or move keys to other machines you can use Import/Export-Certificate cmdlets. Oct 05, 2007 To generate a pair of public and private keys execute the following command: ssh-keygen -t rsa -b 2048 You can use “dsa” instead of the “rsa” after the -t to generate a DSA key. The number after the -b specifies the key length in bits. After executing the command it may take some time to generate the keys (as the program waits for enough entropy to be gathered to generate random numbers).
Start the key generation program.
Enter the path to the file that will hold the key.
By default, the file name id_rsa, which represents an RSA v2 key, appears in parentheses. You can select this file by pressing Return. Or, you can type an alternative filename.
The public key name is created automatically and the string .pub is appended to the private key name.
Enter a passphrase for using your key.
This passphrase is used for encrypting your private key. A good passphrase is 10–30 characters long, mixes alphabetic and numeric characters, and avoids simple English prose and English names. A null entry means no passphrase is used, but this entry is strongly discouragedfor user accounts. Note that the passphrase is not displayed when you type it in.
Re-enter the passphrase to confirm it.
Check the results.
The key fingerprint (a colon-separated series of 2 digit hexadecimal values) is displayed. Check that the path to the key is correct. In the example, the path is /home/johndoe/.ssh/id_rsa.pub. At this point, you have created a public/private key pair.
Copy the public key and append the key to the $HOME/.ssh/authorized_keys file in your home directory on the remote host.
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To use the RSA key pair generator to generate a 4096 bits RSA key and save that key in PEM format in private.key, use./genkey type=rsa rsakeysize=4096 filename=private.key format=pem The larger the requested keysize, the longer it will take to generate the key itself. You also need to take into account the performance of the system. To generate an SSH key pair on Windows using the PuTTYgen program: Download and install PuTTY or PuTTYgen. To download PuTTY or PuTTYgen. Run the PuTTYgen program. The PuTTY Key Generator window is displayed. Set the Type of key to generate option to SSH-2 RSA. In the Number of bits in a.