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)