Roadmap to v1.0.0

Add secure random password generator API.
User account should be locked down when any key, even a deleted key is used successfully.
Add PDF generation
Harden Shamir’s Secret Sharing algorithm with mod Prime.
- See Shamir’s Secret Sharing
- Another alternative implementation uses prime
- Prime should be configurable?
Add Postgres SQL store
The last byte of each share is a random uint8 that identifies that share. That number could be used instead of the share index and would have 1 byte per shard.