RFC 6668 · PROPOSED STANDARD · 2012

SHA-2 Data Integrity Verification for the Secure Shell Transport Layer Protocol

Overview

RFC 6668, “SHA-2 Data Integrity Verification for the Secure Shell Transport Layer Protocol”, is a Proposed Standard document published in July 2012 by D. Bider, M. Baushke. It updates RFC 4253. The canonical text is published by the RFC Editor.

Abstract

This memo defines algorithm names and parameters for use in some of the SHA-2 family of secure hash algorithms for data integrity verification in the Secure Shell (SSH) protocol. It also updates RFC 4253 by specifying a new RECOMMENDED data integrity algorithm. [STANDARDS-TRACK]

Abstract as published in the RFC, via rfc-editor.org.

What “Proposed Standard” means

An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.

Read this RFC

The canonical text of RFC 6668 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
This RFC updates
RFC 4253
Other RFCs from 2012

Who Is Online

In total there are 83 users online: 0 registered, 76 guests and 7 bots.

Most users ever online was 1,226 on 13 Jun 2026, 3:56 am.

Bots: AhrefsBot Applebot Bingbot Googlebot Other Bot SemrushBot Sogou

Users active in the past 15 minutes. Total registered members: 354