C2PA Support for EPUB published

Just wanted to let everyone know that latest version (1.4) of the Content Credentials specification from the C2PA has been released at https://c2pa.org/specifications/specifications/1.4/index.html.  Among the other features provided (and listed below), it includes the ability to add a Content Credential to an EPUB file. An additional useful feature is support for identification within an EPUB of regions of interest, such as where AI was used to produce/edit content.

Hopefully the community will find this work useful in Anti-Counterfeiting, identification of content for non-mining or AI/ML training, and other use cases.

As always, happy to answer any questions.

Leonard
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Here’s the version history section to save you looking it up 😉.
1.4 - November 2023

  *   Added support for embedding a C2PA Manifest into a ZIP-based format (e.g., EPUB, OOXML, ODF, OpenXPS)
  *   Manifests can now be compressed into a special brob box.
  *   Added support for multiple file, aka collection, hashing
  *   Added new regions of interest for text-based formats (e.g., PDF, Office, EPUB, etc.)
  *   Added new c2pa.metadata assertion to support Exif, IPTC, Schema.org and XMP
  *   Major revision to TIFF embedding support
  *   Added support for embedding C2PA Manifests inside of OpenType and TrueType fonts
  *   Introduced support for object-level manifests in PDF
  *   Extended the Link header support for embedded manifests
  *   Clarified issues with box hashing
  *   Clarified issues on signing including time stamping, PKIStatus & document signing EKU
  *   Align with Exif 3.0
  *   Improvements to the CDDL schemas
  *   Many editorial improvements