RFC 4251 on The Secure Shell (SSH) Protocol Architecture

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        RFC 4251

        Title:      The Secure Shell (SSH) Protocol Architecture
        Author(s):  T. Ylonen, C. Lonvick, Ed.
        Status:     Standards Track
        Date:       January 2006
        Mailbox:    ylo%ssh.com@localhost, clonvick%cisco.com@localhost
        Pages:      30
        Characters: 71750
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-ietf-secsh-architecture-22.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc4251.txt


The Secure Shell (SSH) Protocol is a protocol for secure remote login
and other secure network services over an insecure network.  This
document describes the architecture of the SSH protocol, as well as
the notation and terminology used in SSH protocol documents.  It also
discusses the SSH algorithm naming system that allows local
extensions.  The SSH protocol consists of three major components: The
Transport Layer Protocol provides server authentication,
confidentiality, and integrity with perfect forward secrecy.  The User
Authentication Protocol authenticates the client to the server.  The
Connection Protocol multiplexes the encrypted tunnel into several
logical channels.  Details of these protocols are described in
separate documents.

This document is a product of the Secure Shell Working Group of the
IETF. 

This is now a Proposed Standard Protocol.

This document specifies an Internet standards track protocol for
the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the
"Internet Official Protocol Standards" (STD 1) for the
standardization state and status of this protocol.  Distribution
of this memo is unlimited.

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Joyce K. Reynolds and Sandy Ginoza
USC/Information Sciences Institute

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