RFC 2994 · INFORMATIONAL · 2000
SUN · 14 JUN 2026
A Description of the MISTY1 Encryption Algorithm
Overview
RFC 2994, “A Description of the MISTY1 Encryption Algorithm”, is an Informational document published in November 2000 by H. Ohta, M. Matsui. The canonical text is published by the RFC Editor.
Abstract
This document describes a secret-key cryptosystem MISTY1, which is block cipher with a 128-bit key, a 64-bit block and a variable number of rounds. It documents the algorithm description including key scheduling part and data randomizing part. This memo provides information for the Internet community.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 2994 is hosted at rfc-editor.org. Available in TXT,HTML.
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