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Using ZK Proofs to Fight Disinformation (Talk, 2023, Real World Crypto 2023)

Talk

Published March 29, 2023 by Real World Crypto 2023.

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Verifying where and when a digital image was taken has become increasingly difficult; this issue of image provenance is especially concerning in the realm of news media. While fact-checking services can identify misinformation, enabling individuals to personally verify the provenance of photos would prevent them from having to rely on third-parties and empower them to protect themselves. The Coalition for Content Provenance and Authenticity (C2PA) has developed a standard to verify image provenance that relies on digital signatures produced by cameras; however, photos are often edited (cropped, resized, converted to grayscale, etc.) before being included in a news story, and the public cannot validate signatures on the original photo given only the published image. The C2PA standard addresses this issue by having C2PA-enabled editing applications sign the edits that have taken place, but this solution requires trusting the C2PA applications. In contrast, we propose using zk-SNARKs to prove which edits …

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