US 10,536,445 B1

A blockchain is a public bulletin board everyone can see, so even an "encrypted" post is a locked box sitting there for hackers to chip away at. This patent gives the sender and receiver two identical magic notebooks that flip to the same new page in sync. For every message both people independently look at the same page and derive the same secret combination, so the combination never has to be mailed and never travels where it can be stolen. It also changes every single message, so cracking one tells an attacker nothing about the next.

• Paired user and access devices holding matching records
• DASA master plus partial databases kept in sync
• Five-level encryption cascade, layerable on each other
• Level 5 keys built from record + timestamp + random, never sent