What is replacement of SSL/HTTPS in drupal to encrypt login credentials I have one question, in my website i am not using ssl so my drupal login send id and password as plain text, then i have used the encrypt_sumissions module but that is use jcryption library but this is not useful, I want to know how can i encrypt login credentials without ssl/https.

Should I change in drupal core, I am new to this please provide me detailed information.
Thanks
Save yourself the headache and use TLS/SSL. Drupal won't, and isn't meant to, solve your problem. It isn't worth trying to cobble something together. If the cost of the certificate is an issue, go to https://letsencrypt.org/ and get a free cert.