Secondary layer Bismuth shielded tokens
The Bismuth platform allows users to create shielded tokens which are private. The public can not see transactions nor check balances of shielded tokens which they don't have the password for the specific token. Shielded tokens are password protected assets.
Example of a shielded transaction
No indication of which token has been sent nor the amount of the token
Bismuth shielded token links
https://bismuth.cz/shielded.pdf
https://github.com/bismuthfoundation/shielded-tokens