Content Credentials?

[Alan Clifford]

So what is it?  XMP metatdata?

https://petapixel.com/2021/10/26/photoshops-content-credentials-embeds-attribution-data-into-photos/

[Phil Harvey]

No.  It's basically JUMBF metadata using CBOR-format records embedded in a new JPEG segment.  ExifTool already supports reading this, but the specification hasn't yet been finalized.

- Phil

[StarGeek]

Previous thread

[Phil Harvey]

Thanks StarGeek.  I forgot about that thread.  Most of the communication with interested parties has been via email.

That thread makes no mention of CBOR, but the current version of the specification uses CBOR instead of JSON for most records.

Yes, not XMP.  And you can see why.  Apparently even JSON was too bulky for them (and it's far less bulky than XMP), so they went to CBOR (Concise Binary Object Representation).

- Phil

[Alan Clifford]

I'm just curious about this.  Is there any reason why it can't just be removed or modified like any other metadata?

[Phil Harvey]

You can remove it with

exiftool -app11:all= FILE

ExifTool doesn't have the ability to modify it because the format is complex and the demand is low for this feature.

- Phil