The following documents development of a message queue service using RSA encryption and blockchain technology.
Sign up/login generates 1024 bit RSA keys, client side, based on unique usernames and passwords. Only user public keys are posted back to the server. Message posts/gets uses the desired public key and client side private key to encrypt/decrypt messages. Encrypted messages are sent to a decentralized, open blockchain database.
Python scripts run on serverless compute AWS Lambda. Storage for javascript, user keys, and blockchain objects are stored in AWS S3. Please note blockchain objects (messages) are purged daily.
Demo: https://tinyurl.com/blockchainmq
Questions or comments: jason@solvingnet.com