Proton Mail Rolls Out Blockchain Tool to Verify Email Addresses, Foil Surveillance
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Proton Mail is introducing a new blockchain-based feature called Key Transparency to verify users' email addresses.
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It will put users' public keys on a blockchain to create an immutable record, preventing "man-in-the-middle" attacks.
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The feature will run on Proton's private blockchain initially before potentially moving to a public one.
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It's aimed at users with high-risk threat models like leaders and activists, though Proton Mail has 100M accounts.
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Proton Mail's CEO says it's a way to opt out of mass surveillance prevalent among other email services.