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GNU/Linux Desktop Survival Guide
by Graham Williams
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DSA Key Generation


Version 2 of ssh provides alternative encryption methods with DSA encryption instead of the RSA keys for Version 1. There is debate as to which is more secure. Version 2 encrypts more of the data but always uses the same Diffie-Hellman group (perhaps being more likely then that it has been cracked).



  inx$ ssh-keygen -t dsa
  Generating public/private dsa key pair. 
  Enter file in which to save the key (/home/kayon/.ssh/id_dsa): 
  Enter passphrase (empty for no passphrase): 
  Enter same passphrase again: 
  Your identification has been saved in /home/kayon/.ssh/id_dsa. 
  Your public key has been saved in /home/kayon/.ssh/id_dsa.pub. 
  The key fingerprint is:
  cc:50:d4:85:86:56:b8:8a:77:57:61:51:63:89:46:09 kayon@inx
  $ scp .ssh/id_dsa.pub alpine:.ssh/authorized_keys2.inx

  $ ssh alpine
  $ cd .ssh
  $ cat authorized_keys2.inx >> authorized_keys2
  $ exit

Be sure the protections on the files do not permit others to access them. In particular, ssh won't work if the /home/kayon/.ssh/authorized_keys is writable by anyone other than the user.


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