Obscura Vault articles: preserving originals, fixity checks, the .obf format.https://vault.obscuraflow.app/en/blogenhttps://vault.obscuraflow.app/en/blog/prouver-qu-une-photo-n-a-pas-ete-modifieehttps://vault.obscuraflow.app/en/blog/prouver-qu-une-photo-n-a-pas-ete-modifieeFingerprint, fixity check, signature, date, preservation certificate: how to give verifiable proof of a digital photograph's integrity, and what that proof does not say.Thu, 15 Oct 2026 00:00:00 GMTpreservation certificateintegritydigital signaturefixityhttps://vault.obscuraflow.app/en/blog/archives-photographiques-dans-20-anshttps://vault.obscuraflow.app/en/blog/archives-photographiques-dans-20-ansProprietary software, opaque formats, a vanished vendor, a lost key: what threatens long-term photo archiving, and why a truly lasting archive should not depend on the survival of the software that created it.Thu, 08 Oct 2026 00:00:00 GMTlong-term archivingphotographic heritageopen formatsencryptionhttps://vault.obscuraflow.app/en/blog/sauvegarder-n-est-pas-preserverhttps://vault.obscuraflow.app/en/blog/sauvegarder-n-est-pas-preserverThree copies on several drives is a good backup strategy. It is not yet preservation. Copy, backup, archiving, preservation: what sets them apart, and what preservation adds.Thu, 01 Oct 2026 00:00:00 GMTbackupdigital preservation3-2-1offsite copieshttps://vault.obscuraflow.app/en/blog/integrite-des-fichiers-numeriqueshttps://vault.obscuraflow.app/en/blog/integrite-des-fichiers-numeriquesA JPEG, TIFF or RAW file is not damaged by being opened, but its bytes can still change without warning. What fixity means, what a SHA-256 checksum is for, and how to keep checking the integrity of your photographs over time.Thu, 24 Sep 2026 00:00:00 GMTintegrityfixitySHA-256digital preservation