The whole smart contract is not secure.
Everybody can see the password using two methods:
Read the value at the memory slot where 'string private s_password' is stored.
Decode the data from a 'setPassword' transaction
Sensitive data is not secure.
Manual review
Don't store sensitive data on chain.
Private functions and state variables are only visible for the contract they are defined in and not in derived contracts. In this case private doesn't mean secret/confidential
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