drupal 7 Password field values are passed plain text

Required any mechanism to solve the issue “Password field values are passed plain text”.
only running site on https will resolve the problem and will clear security audit? If not please guide the steps to be followed or modules required to be installed to increase security. As we have tried to install encrypt_submission module in vain for which support has been discontinued…
Please guide us step by step method to encrypt passwords before sending them to server via salting hashing or any other mechanism. if we install https only will it vulnerable free?

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