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Status:

INFORMATIONAL

Authors:

C. Wallace
C. Gardiner

Stream:

IETF

Source:

pkix (sec)

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DOI:  https://doi.org/10.17487/RFC6025

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Abstract

Abstract Syntax Notation One (ASN.1) is widely used throughout theIETF Security Area and has been for many years. Some specificationswere written using a now deprecated version of ASN.1 and some werewritten using the current version of ASN.1. Not all ASN.1 compilerssupport both older and current syntax. This document is intended toprovide guidance to specification authors and to implementersconverting ASN.1 modules from one version of ASN.1 to another versionwithout causing changes to the "bits on the wire". This documentdoes not provide a comprehensive tutorial of any version of ASN.1.Instead, it addresses ASN.1 features that are used in IETF SecurityArea specifications with a focus on items that vary with the ASN.1version. This document is not an Internet Standards Track specification; it is published for informational purposes.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.