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They don't just filter their e-mail platforms and consume hash lists from law enforcement agencies. On the contrary, Microsoft funds and freely distributes the
by AaronFriel 8y ago
They don't just filter their e-mail platforms and consume hash lists from law enforcement agencies. On the contrary,
Microsoft funds and freely distributes the most common tool for checking photos (not file hash based, I think proprietary). That's likely the project the employees you mentioned were on, a job I wouldn't wish on anyone I know. I hope they were well supported both while working and afterward.
https://www.microsoft.com/en-us/photodna https://www.microsoft.com/en-us/photodna
- vermilingua 8y agoIt states immediately below the fold that it uses hash lists.
- AaronFriel 8y agoI want to avoid using the term - even though they use it - because it's not a hash function like most people are familiar from computer science. Their "hash" function is resistant to alterations and is more like a "fingerprint". Edit: to be completely clear, PhotoDNA isn't a cryptographic hash. It's a hash function that maximizes similarity of hashes based on inputs, and is probably closer to a bloom filter in some respects.
- totallybro 8y agototally, bro.
- throwaway218649 8y agoThese algorithms are called "fuzzy hashing." Examples include "ssdeep," "smapsum," and "nilsimsa."
- solarkraft 8y agoIs this what I know as 'image hash'?