Detect
Monitor readability samples/dependencies; matching digests can still be unreadable.
MOBILE-ID · TRUSTED LTANS
Original bytes and document readability
Distinguish byte integrity from readability; manage originals, renditions, tools and quality acceptance.
Byte integrity and readability are distinct tasks
Cryptographic evidence binds deposited bytes. Readability depends on formats, software, fonts, codecs and decryption access. Conversion scope requires separate agreement.
| Object | Managed information | Check |
|---|---|---|
| Original | Bytes, actual format/MIME, revision and digest; never replace with a conversion. | Retrieve exact bytes and verify original binding. |
| Format inventory | Software/version, fonts/codecs, external dependencies and license constraints. | Exercise opening/rendering in an authorized environment. |
| Rendition | New object with separate digest/evidence and source linkage. | Check content, pages, layout, fields and losses. |
| Conversion event | Tool, version, parameters, approver and quality findings. | Reproduce samples; original signatures do not automatically validate changed bytes. |
When a format loses support
Choose strategy
Retain a reader environment, convert or provide a rendition under approved requirements.
Accept linkage
Retain original, derivative, authority and differences; no universal feature-preservation claim.