UpdatedPROPOSED STANDARDIETF stream

RFC 4432: RSA Key Exchange for the Secure Shell (SSH) Transport Layer Protocol

Still current, but amended. Parts of this document are changed or extended by RFC 9142. Read both.

In plain English — editorial summary, not part of the RFC

This memo describes a key-exchange method for the Secure Shell (SSH) protocol based on Rivest-Shamir-Adleman (RSA) public-key encryption. It uses much less client CPU time than the Diffie-Hellman algorithm specified as part of the core protocol, and hence is particularly suitable for slow client systems. [STANDARDS-TRACK]

Document record

Document ID: RFC4432
Published: March 2006
Authors: B. Harris
Status: PROPOSED STANDARD
Stream: IETF
Area: —
Pages: 8
Also known as: —

Updated by:: RFC 9142

Topics

Referenced by

One later RFC formally updates or obsoletes part of this document.

RFC 9142Key Exchange (KEX) Method Updates and Recommendations for Secure Shell (SSH)Current
January 2022

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on 23 August 2026. RFCs are never revised after publication; changes are issued as new documents.

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