Secure Shell (SSH) is a way of logging into a remote computer to execute commands
on that machine.
SSH keys are used in key-based authentication system, as an alternative to the default password
authentication system.
With key-based authentication there is no need to manually type a password to authenticate.
Secure Shell keys are made of two keys: a private key, that must be kept secret,
and a public key which can be uploaded to any computer you need to access.
To create a Secure Shell key:
-
Choose
-
Select Secure Shell Key and click Continue
-
Enter a description of what the key is to be used for. You can use your e-mail address or any other reminder. You can also specify advanced options for the key: see below.
-
Click Just Create Key to
create the new key, or Create and Set Up
to create the key and set up another computer to use it for authentication.
-
The Passphrase for New Secure Shell Key
dialog opens.
Enter the passphrase twice for your new key.
Use similar practices to generating a
strong password when choosing a
passphrase. The main difference between a
password and a passphrase is that, in a
passphrase, spaces are valid characters.
Expand the Advanced key options section to specify the following options for a new key:
- Encryption Type
-
This field specifies the encryption
algorithms used to generate your key.
- RSA
-
Use the Rivest-ShamirAdleman
(RSA) algorithm to create the SSH key.
This is the preferred and more secure choice.
- DSA
-
Use the Digital Signature Algorithm
(DSA) to create the SSH key.
- Key Strength (bits)
-
This is the length of the key in bits.
The longer the key, the more secure it
will be, provided a strong passphrase is
used. Conversely, performing any
operation with a longer key will require
more time than it would with a shorter
key. Acceptable values are between 1024
and 4096 bits. At least 2048 bits is recommended.
O spletišču
Avtorske pravice
- Copyright © 2005, 2006, 2007, 2008, 2009 Jacob Perkins and Adam Schreiber
Pravna opomba
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Feedback
To report a bug or make a suggestion regarding the
Passwords and Keys application or this manual, follow the directions in the
Gnome Feedback Page.