Digest Fields (Content-Digest and Repr-Digest)
type: TechArticle
description: RFC 9530 lets a server publish a cryptographic hash of what it sent, so a client can detect corruption in transit. Worth shipping on APIs, file downloads, and machine-readable endpoints; browsers ignore it.
language: en
is part of: Web Specification Studio
author: Web Specification Studio
publisher: Web Specification Studio
license: https://creativecommons.org/licenses/by/4.0/
date modified: 2026-07-08T00:00:00.000Z
citation: RFC 9530 — Digest Fields
  type: CreativeWork
  publisher: IETF
citation: RFC 9110 — HTTP Semantics §8.1 (Representation Data), §6.4 (Content)
  type: CreativeWork
  publisher: IETF
citation: IANA — Hash Algorithms for HTTP Digest Fields
  type: CreativeWork
  publisher: IANA
citation: RFC 9421 — HTTP Message Signatures
  type: CreativeWork
  publisher: IETF

Web Specification Studio
type: WebSite

Web Specification Studio
type: Organization

breadcrumb
type: BreadcrumbList
item list element: Home
  type: ListItem
  position: 1
  item: https://webspecification.com/
item list element: Spec
  type: ListItem
  position: 2
  item: https://webspecification.com/spec/
item list element: Security
  type: ListItem
  position: 3
  item: https://webspecification.com/spec/security/
item list element: Digest Fields (Content-Digest and Repr-Digest)
  type: ListItem
  position: 4
  item: https://webspecification.com/spec/security/digest-fields/