Greetings ma,

The ZK-SNARK protocol in blockchain provides privacy and confidentiality for transactions, allowing a user to prove the facts of a transaction without disclosing any sensitive information about that transaction. Isn't that pretty awesome?

However, as you have rightly listed is that one of the drawbacks of ZK-SNARK is that it needs a trusted setup during its initialization, which people may find disturbing. Likewise, the process of validation is said to be computationally intensive, leading to requiring higher resources.

Thank you for sharing your indebt knowledge on this topic with us. Good luck.