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)

LSH                                               JANUARY 1999                                          SECSH(5)