3 ms·
Couldn'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.
by doubleunplussed 10y ago
Couldn'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.