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I believe this technique of storing hashes on a blockchain is how public figures should be inoculating against the upcoming risk posed by deepfakes. If a video

I believe this technique of storing hashes on a blockchain is how public figures should be inoculating against the upcoming risk posed by deepfakes. If a video surfaces that’s faked from an existing hashed one, that’s a very easy proof.

exdsq 7y ago
Solid idea actually! Can you think of a way to wrap this as a product?
- joshspankit 7y ago
  Fun challenge. As a product it could be an independent video verification service. On-demand: A client wants to release a video and make sure that it’s trusted. They contact the company first, some process is done to make sure that they represent who they say they represent, and the content is hashed and added to the blockchain prior to release. Ongoing: when a client uploaded a video to the web, the system would automatically grab it, generate the hash, and add it to the blockchain along with the metadata of where it was found and who the client was. For large clients, it could even include video cold storage. For marketing/promotion, the company could automatically process public media from well-established social media feeds.
maxfan8 7y ago
How would this work? We’d still need something that can detect similar/probably deepfaked content (a good cryptographic hash has random distribution).
- RobLach 7y ago
  Furthermore common actions such as re-encoding a video for streaming will generate a copy of the content that's identical but a completely different hash which will generate an ecosystem of real and deepfaked content with a similar amount of noise that deepfaked content thrives in.
- gjs278 7y ago
  whichever hash is first
- joshspankit 7y ago
  At it’s most basic it only focuses on the original source with the original encoding. For consistency, metadata would be stripped before hash, but it’s understood that even “save as” can produce a file with a totally different hash. It would be up to the creator (or some third party) to keep the original unedited video so that if there was ever a dispute about a fake surfacing that original could be undeniably verified to be the authentic one.

exdsq 7y ago

Solid idea actually! Can you think of a way to wrap this as a product?

joshspankit 7y ago
Fun challenge. As a product it could be an independent video verification service. On-demand: A client wants to release a video and make sure that it’s trusted. They contact the company first, some process is done to make sure that they represent who they say they represent, and the content is hashed and added to the blockchain prior to release. Ongoing: when a client uploaded a video to the web, the system would automatically grab it, generate the hash, and add it to the blockchain along with the metadata of where it was found and who the client was. For large clients, it could even include video cold storage. For marketing/promotion, the company could automatically process public media from well-established social media feeds.

maxfan8 7y ago

How would this work? We’d still need something that can detect similar/probably deepfaked content (a good cryptographic hash has random distribution).

RobLach 7y ago
Furthermore common actions such as re-encoding a video for streaming will generate a copy of the content that's identical but a completely different hash which will generate an ecosystem of real and deepfaked content with a similar amount of noise that deepfaked content thrives in.
gjs278 7y ago
whichever hash is first
joshspankit 7y ago
At it’s most basic it only focuses on the original source with the original encoding. For consistency, metadata would be stripped before hash, but it’s understood that even “save as” can produce a file with a totally different hash. It would be up to the creator (or some third party) to keep the original unedited video so that if there was ever a dispute about a fake surfacing that original could be undeniably verified to be the authentic one.