I’ve updated the research in this open guide, Crypto account access control.
New additions
- Sismo is interesting as it potentially provides more privacy because it uses zk-proofs to create Soulbound tokens using a contract to assign specific access.
- Delegatable created by Dan Finlay, the co-founder of MetaMask takes the approach of integrating access controls directly into an app’s contract instead of a contract needing to be updated to integrate with an outside registry like with Delegate.cash.
Useful research to be done would be to learn more on the decentralization of each solution as well as estimating the return-on-investment.