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Dropbox is known to have intergration with PhotoDNA, a state program that matches file signature with a database of known illicit images. This would be impossib
by Laforet 10y ago
Dropbox is known to have intergration with PhotoDNA, a state program that matches file signature with a database of known illicit images. This would be impossible if the encryption used is irreversible and as far as I know dropbox never claimed otherwise.
- smaddox 10y agoI'm not claiming it is end-to-end, nor did I expect it to be, but perhaps some people would assume that. I thought you were claiming they don't use encryption at all.
- mikepurvis 10y agoIt's effectively nothing when Dropbox themselves have access to all your files whenever they want.
- jacquesm 10y agoAnd whoever hacks dropbox, yours or all of them.
- doubleunplussed 10y agoCouldn't dropbox hash the images on the client, and upload the encrypted images as well as the hash? No need to upload an unencrypted file to do matching.
- eru 10y agoDepends on what kind of hashing they do: a scheme like yours using a cryptographic hash would be defeated by just randomly changing a single bit in the image (eg appending some garbage bytes at the end); or re-encoding the jpeg. Of course, it could still catch non-techy people.