US Patent 11755772 Securing data in a blockchain with a one-time pad

A system that generates a blockchain for a user wherein each block in the chain contains encrypted information associated with the user. The information in each block is encrypted and decrypted by a key that is generated based on a function, a starting point and a length that is shared with participants that have access to the data in each block. The access can be controlled with granularity by the owner of the information without having cumbersome passkey management.