Pribado

Pribado is a non-custodial zero-knowledge key manager vault.

It uses different kinds of encryption and handles all user data on local.
It's up to the user if they want to use smart contract functions.

It's open source, you can fork, clone it or self-host the app.
Change the codes, change the encryptions, change logo, change the name.
It's up to you.

This is the smart contract that runs on background during key encryption/decryption.

https://explorer.oasis.io/mainnet/sapphire/address/0xabE5D482AceFED95E0D37dA89bC63F941f02f9A0/code#code