messages-on-chain

PoC about message on blockchain

• Public messages
• Private messages encrypted using RSA (additional keys are required)
• Private messages encrypted using EC (the wallet's keys are used)

Getting started

Create a .data directory

• primary.key is the wallet's private key (never shared)
• rsa.pem is the private key for RSA decryption (never shared)
• rsa.public_key.pem is the public key for RSA encryption (shared)

Wallet key

The wallet's private key should has balance great than zero to can write messages.

Generate RSA keys

Generate private key

$ openssl genrsa -out private_key.pem 4096

Generate public key

openssl rsa -pubout -in private_key.pem -out public_key.pem

testnet

• Configure Polygon Tesnet Mumbai
• Claim MATIC in https://testmatic.vercel.app/ or https://faucet.polygon.technology/ ()

References

• Asymmetric encryption (Public-key cryptography) with Node.js
• Elliptic Curve Integrated Encryption Scheme (ECIES)
• How to recover the public key and address from a signed message?