0xturboblitz/stuff-with-signatures

types of information in the world that are digitally signed, along with projects that use zk proofs over these signatures

Stuff with Signatures

Digital signatures allow us to verify that a piece of data has been unmodified and was produced by a certain entity. They are especially useful in the context of zero-knowledge proofs, where they enable a party with access to the signature and its underlying data to prove properties about the data without revealing the data itself.

To aid the development of zero-knowledge applications and the adoption of digital signatures as a whole, here is a list of types of data in the world that come with digital signatures, along with projects that generate zero-knowledge proofs about them.

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The List

• Email (DKIM signatures)
  • [PROJECT] ZK Email
  • [PROJECT] ZKP2P
• Passports (150+ countries have biometric/e-passports)
  • [PROJECT] Proof of Passport
• EU Residence Cards for foreign nationals
• eIDAS (future electronic id cards for EU citizens)
• Credit Card Transactions (EMV cryptograms)
  • [PROJECT] GOAT RAMP
• HTTPS/TLS (signatures are only used during the key-exchange handshake, to prove authenticity of sessions a workaround is needed)
  • [PROJECT] TLS Notary (Performs an MPC with a 3rd party notary)
  • [PROJECT] Reclaim Protocol (A 3rd party provides an attesting signature)
• Git commits
• Ethereum Attestation Service (EAS), including Coinbase onchain verification and Gitcoin Passport
• Proof of Humanity

National ID Cards

• India's Aadhaar
  • [PROJECT] Anon aadhaar
• Japan's My Number Cards
  • [PROJECT] Myna Wallet
• Taiwan DID
  • [PROJECT] tw-did

Onchain data

• Ethereum transactions and state
  • [PROJECT] Axiom
• Poaps
• Semaphore identities