PGP Signing Demo

• Goals
• Sign data with two PGP public keys which are based on a Ethereum private key
• Both parties should be able to decrypt the payload without the need for both keys

WARNING DO NOT USE THE PRIVATE KEYS IN THIS REPO!

Execution order

• Bob generates PGP keys offchain using private key as seed
• Bob sends public key to client (webapp)
• Alice visits site - generates PGP key locally (in browser) using web3 enable private key
• Alice fills in required data
• Alice, in combination with Bobs public key, signs the payload
• Alice then places this on chain (via a smart contract) for all to see
• Bob then listens for new entries to this smart contract and can decrypt away using only private key he has
• Data could be stored on IPFS and then this is the hash used onchain only

Demo scripts

1. $ node ./scripts/generate_buyer_pgp_key.js

   • Generates public/private key

2. $ node ./scripts/generate_seller_pgp_key.js

   • Generates public/private key

3. $ node ./scripts/sign_payload.js

   • Encrypts random JSON blob with both public keys
   • Pins PGP encrypted message to IPFS

4. $ node ./scripts/decrypt_payload.js

   • Decrypts random JSON blob for both parties using individual private key

5. $ node ./scripts/decrypt_ipfs_hash.js

   • Downloads given IPFS blob
   • Decrypts blob for both parties using individual private key