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Full Discussion: Are free public shells for ssh tunneling safe?
Top Forums Shell Programming and Scripting Are free public shells for ssh tunneling safe? Post 302468089 by DGPickett on Monday 1st of November 2010 03:20:36 PM
Old 11-01-2010
No, once you set the key, they are locked out.

You should get your ssh code from trustworth sources, as hackers can easily modify open source from trap doors. This applies to all downloads! Beware of odd binary code sources.

I believe ssh2 is both free and stronger. If you do a little man page reading, you can find out how to maximize your key size. This is especially important when you do passwordless PK access, where the key password is blank. I believe ther are even tools out there to embed the key's password in a running session, so it can be proffered by your avatar at approriate moments to unlock your key. BTW, the keys are just used a short while, to start up the connection session, and then a random session key runs the session for a longer time before a new key is negotiated.
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LEARN ABOUT HPUX

keylogout

keylogout(1)						      General Commands Manual						      keylogout(1)

NAME

       keylogout - delete stored secret key with keyserv

SYNOPSIS

       [ ]

DESCRIPTION

       deletes the key stored by the key server process Further access to the key is revoked; however, current session keys may remain valid until
       they expire or are refreshed.

       Deleting the keys stored by will cause any background jobs or scheduled at(1) jobs that need secure RPC services to fail.  Since  only  one
       copy  of the key is kept on a machine, it is a bad idea to place a call to this command in your file since it will affect other sessions on
       the same machine.

   Options
       Force  to delete the secret key for the superuser.  By default, by the superuser is disallowed because it would	break  all  RPC  services,
	      such as NFS, that are started by the superuser.

AUTHOR

       was developed by Sun Microsystems, Inc.

SEE ALSO

       at(1), chkey(1), login(1), keylogin(1), keyserv(1M), newkey(1M), publickey(4).

																      keylogout(1)
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