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NAME

       secsh - the Secure Shell protocol

DESCRIPTION

       secsh  is  a  protocol  suite  for secure remote login and other secure
       network services over an insecure network. It is outlined  in  [SECSH].
       It has three major components:

       The Transport layer protocol
              This   protocol,   specified  in  [SECSH-TLP],  provides  server
              authentication,  confidentiality,  and  integrity  with  perfect
              forward secrecy.

       The User authentication protocol
              This   protocol,   specified   in   [SECSH-AUTH],   is  used  to
              authenticate a client to a server.

       The Connection protocol
              This  protocol,  specified  in  [SECSH-CONN],   multiplexes   an
              encrypted tunnel into several logical channels.

IMPLEMENTATIONS

       Several implementations of the secsh protocol suite exist.

       The   SSH2   product  of  SSH  Communications  Security  Ltd.,  Finland
       <URL:http://www.ssh.fi> was the first. The  secsh  protocol  suite  has
       benefited  a  lot  from their experience with their older SSH1 product,
       which is still in widespread  use;  it  implements  an  older  protocol
       ([SSH1]).

       The  lsh  suite  of  programs  is  a  free  implementation of the secsh
       protocol suite; it is distributed under the GNU General Public License.

REFERENCES

       [SECSH-ARCH]  T.  Ylonen,  T.  Kivinen,  M.  Saarinen,  T. Rinne and S.
       Lehtinen, SSH Protocol Architecture, Internet draft, 6 August 1998

       [SECSH-TRANS] T. Ylonen, T. Kivinen,  M.  Saarinen,  T.  Rinne  and  S.
       Lehtinen, SSH Transport Layer Protocol, Internet draft, 6 August 1998

       [SECSH-AUTH]  T.  Ylonen,  T.  Kivinen,  M.  Saarinen,  T. Rinne and S.
       Lehtinen, SSH Authentication Protocol, Internet draft, 6 August 1998

       [SECSH-CONN] T. Ylonen, T.  Kivinen,  M.  Saarinen,  T.  Rinne  and  S.
       Lehtinen SSH Connection Protocol, Internet draft, 6 August 1998

       [SSH1]  T.  Ylonen,  The  SSH  (Secure  Shell)  Remote  Login Protocol,
       Internet draft (expired), 15 November 1995

TRADEMARKS

       SSH and Secure Shell are trademarks or  registered  trademarks  of  SSH
       Communications Security Ltd.

AUTHOR

       This     man-page     was    written    by    J.H.M.    Dassen    (Ray)
       <jdassen@wi.LeidenUniv.nl>.

SEE ALSO

       lsh(1), lshd(8), ssh2(1), sshd2(8), ssh1(1), sshd1(8)