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auto-ingest: ietf-elements backfill — 53 new elements (2026-07-06)
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document: rfc-9482
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kind: design-rationale
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summary: CoAP over UDP is specified as the primary transport (not CoAP over TCP/TLS/WebSockets) because this document targets constrained IoT devices, which benefit from UDP's lower overhead; CMP's own PKIProtection provides integrity without requiring a reliable transport.
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section: "1"
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topics:
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- pkix
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- security
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: design-rationale
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summary: Multicast CoAP is prohibited for CMP PKIMessages because CMP transactions require point-to-point exchanges with specific RAs or CAs, and multicast delivery would undermine the targeted, transactional nature of certificate management.
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section: "2.5"
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topics:
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- pkix
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- multicast
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: interoperability-note
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summary: This document follows the HTTP transfer for CMP specifications in RFC 6712 and is designed so a CoAP-to-HTTP proxy can bridge CoAP-speaking constrained EEs to existing PKI entities already providing CMP over HTTP without changes to the PKI implementation.
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section: "1"
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topics:
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- pkix
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- http
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: normative-requirement
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summary: An EE SHOULD periodically reregister itself for CMP announcement messages, since a server can remove the EE from its list of observers at any time.
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section: "2.6"
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rfc2119_level: SHOULD
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topics:
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- pkix
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: normative-requirement
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summary: CMP PKIMessages MUST be DER encoded and sent as the body of a CoAP POST request. Each CoAP request MUST be marked as a Confirmable message.
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section: "2.3"
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rfc2119_level: MUST
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topics:
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- pkix
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- security
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: normative-requirement
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summary: CMP PKIMessages sent over CoAP MUST NOT use a Multicast destination address.
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section: "2.5"
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rfc2119_level: MUST NOT
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topics:
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- pkix
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- multicast
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: normative-requirement
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summary: CoAP CMP endpoints supporting service discovery MUST also support resource discovery in the CoRE Link Format (RFC 6690), and the link MUST include the 'ct' attribute with the value 'application/pkixcmp'.
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section: "2.2"
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rfc2119_level: MUST
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topics:
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- pkix
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- registry
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: normative-requirement
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summary: CoAP endpoints MUST support use of the path prefix '/.well-known/' and the registered name 'cmp' to enable endpoint discovery and interoperability.
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section: "2.1"
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rfc2119_level: MUST
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topics:
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- pkix
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- registry
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: normative-requirement
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summary: EEs and RAs or CAs MUST use block-wise transfer mode (RFC 7959) to transfer CMP messages larger than the MTU of the outgoing interface, instead of relying on IP fragmentation.
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section: "2.4"
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rfc2119_level: MUST
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topics:
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- pkix
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"
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document: rfc-9482
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kind: normative-requirement
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summary: If a CoAP-to-HTTP proxy is in the path and the server supports it, the proxy MUST use chunked transfer encoding (RFC 9112) over HTTP and MUST try to reduce the number of packets by using an optimal chunk length.
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section: "2.4"
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rfc2119_level: MUST
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topics:
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- pkix
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- http
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-06"

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