Mijn 'Hoe moeilijk kan het zijn?' van deze week. Dat deepfakes steeds echter en makkelijker worden bedreigt de geloofwaardigheid van video's. Echtheidscertificaten op basis van - jawel! - de blockchain zouden kunnen helpen.
https://www.volkskrant.nl/wetenschap/wapen-in-de-strijd-tegen-deepfakevideo-s-een-echtheidscertificaat~b1a6e3d5/ …
#HMKHZ via de @volkskrant
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(1) Poor scalability w.r.t write throughput (2) Needs vendor to keep a record of where on ledger the protective hash is; if operator goes out of business, the hash is lost forever (3) needs real time read of ledger upon display or worse wholesale replication of ever-larger ledger
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PKI is superior in almost every way. (1) Issuing of certs for signing keys highly scalable (2) Protective hash is part of digital signature embedded in the file; no need to lookup the protective hash using some kind of intermediary (3) Verification possible without server call
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