[lamps] WG Review: Limited Additional Mechanisms for PKIX and SMIME (lamps)
The IESG <email@example.com> Fri, 03 May 2019 16:35 UTC
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Date: Fri, 03 May 2019 09:35:17 -0700
Subject: [lamps] WG Review: Limited Additional Mechanisms for PKIX and SMIME (lamps)
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The Limited Additional Mechanisms for PKIX and SMIME (lamps) WG in the Security Area of the IETF is undergoing rechartering. The IESG has not made any determination yet. The following draft charter was submitted, and is provided for informational purposes only. Please send your comments to the IESG mailing list (firstname.lastname@example.org) by 2019-05-13. Limited Additional Mechanisms for PKIX and SMIME (lamps) ----------------------------------------------------------------------- Current status: Active WG Chairs: Russ Housley <email@example.com> Tim Hollebeek <firstname.lastname@example.org> Assigned Area Director: Roman Danyliw <email@example.com> Security Area Directors: Benjamin Kaduk <firstname.lastname@example.org> Roman Danyliw <email@example.com> Mailing list: Address: firstname.lastname@example.org To subscribe: https://www.ietf.org/mailman/listinfo/spasm Archive: https://mailarchive.ietf.org/arch/browse/spasm/ Group page: https://datatracker.ietf.org/group/lamps/ Charter: https://datatracker.ietf.org/doc/charter-ietf-lamps/ The PKIX and S/MIME Working Groups have been closed for some time. Some updates have been proposed to the X.509 certificate documents produced by the PKIX Working Group and the electronic mail security documents produced by the S/MIME Working Group. The LAMPS (Limited Additional Mechanisms for PKIX and SMIME) Working Group is chartered to make updates where there is a known constituency interested in real deployment and there is at least one sufficiently well specified approach to the update so that the working group can sensibly evaluate whether to adopt a proposal. The LAMPS WG is now tackling these topics: 1. Specify a discovery mechanism for CAA records to replace the one described in RFC 6844. Implementation experience has demonstrated an ambiguity in the handling of CNAME and DNAME records during discovery in RFC 6844, and subsequent discussion has suggested that a different discovery approach would resolve limitations inherent in the approach used in RFC 6844. 2. Specify the use of SHAKE128/256 and SHAKE256/512 for PKIX and S/MIME. Unlike the previous hashing standards, the SHA-3 family of functions are the outcome of an open competition. They have a clear design rationale and have received a lot of public analysis, giving great confidence that the SHA-3 family of functions are secure. Also, since SHA-3 uses a very different construction from SHA-2, the SHA-3 family of functions offers an excellent alternative. In particular, SHAKE128/256 and SHAKE256/512 offer security and performance benefits. 3. Specify the use of short-lived X.509 certificates for which no revocation information is made available by the Certification Authority. Short-lived certificates have a lifespan that is shorter than the time needed to detect, report, and distribute revocation information. As a result, revoking short-lived certificates is unnecessary and pointless. 4. Specify the use of a pre-shared key (PSK) along with other key management techniques with supported by the Cryptographic Message Syntax (CMS) as a mechanism to protect present day communication from the future invention of a large-scale quantum computer. The invention of a large-scale quantum computer poses a serious challenge for the key management algorithms that are widely deployed today, especially the key transport and key agreement algorithms used today with the CMS to protect S/MIME messages. 5. Specify the use of hash-based signatures with the Cryptographic Message Syntax (CMS). Hash-based signature use small private and public keys, and they have low computational cost; however, the signature values are quite large. For this reason they might not be used for signing X.509 certificates or S/MIME messages; however, since hash-based signature algorithms are secure even if a large-scale quantum computer is invented. The low computational cost for signature verification makes hash-based signatures attractive in the Internt of Things environments, and the quantum resistance makes them attractive for the distribution of software updates. 6. Specify a certificate extension that is carried in a self-signed certificate for a trust anchor, which is often called a Root Certification Authority (CA) certificate, to identify the next public key that will be used by the trust anchor. 7. Update the specification for the cryptographic protection of email headers -- both for signatures and encryption -- to improve the implementation situation with respect to privacy, security, usability and interoperability in cryptographically-protected electronic mail. Most current implementations of cryptographically-protected electronic mail protect only the body of the message, which leaves significant room for attacks against otherwise-protected messages. In addition, the LAMPS WG may investigate other updates to documents produced by the PKIX and S/MIME WGs, but the LAMPS WG shall not adopt any of these potential work items without rechartering. Milestones: Jun 2018 - Adopt a draft for short-lived certificate conventions Jun 2018 - Adopt a draft for the CMS with PSK Jun 2018 - Adopt a draft for hash-based signatures with the CMS Jun 2018 - Adopt a draft for root key rollover certificate extension Jul 2018 - rfc6844bis sent to IESG for standards track publication Aug 2018 - Root key rollover certificate extension sent to IESG for informational publication Sep 2018 - SHAKE128/256 and SHAKE256/512 for PKIX sent to IESG for standards track publication Sep 2018 - SHAKE128/256 and SHAKE256/512 for S/MIME sent to IESG for standards track publication Oct 2018 - Short-lived certificate conventions sent to IESG for BCP publication Oct 2018 - The CMS with PSK sent to IESG for standards track publication Dec 2018 - Hash-based signatures with the CMS sent to IESG for standards track publication