RFC 9939 · PROPOSED STANDARD · 2026
MON · 27 JUL 2026
PKCS #8: Private-Key Information Content Types
Overview
RFC 9939, “PKCS #8: Private-Key Information Content Types”, is a Proposed Standard document published in February 2026 by J. Mandel, R. Housley, S. Turner. The canonical text is published by the RFC Editor.
Abstract
This document defines PKCS #8 content types for use with PrivateKeyInfo and EncryptedPrivateKeyInfo as specified in RFC 5958.
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 9939 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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