Would this be vulnerable to a user’s computer being hacked? If they gain access on client side then they would be able to gain access to anything their keychain can grant access to? There’s vulnerabilities at every point when there’s an exchange of sensitive information no matter what, correct?

Asking for clearer understanding of the purpose of the keychain. I thought the purpose of having the different keys was for security, if one is compromised others are still potentially safe? But if the keychain is compromised isn’t all of it unsafe?