Do you ask for personal information as part of your signup process? First name, last name, email address etc? If you don't encrypt the data or take basic precautions against unauthorised access you're likely breaking Data Protection law.
If you've already implemented a web server with SSL then "weak cyphers" might bother you. As you don't already have it configured, you're no worse off configuring a fully TLS 1.2-compliant web server with SHA256 signed certs and ChaCha20-Poly1305 cypher suite. It's just a configuration option if you're doing it for the first time.
If you've already implemented a web server with SSL then "weak cyphers" might bother you. As you don't already have it configured, you're no worse off configuring a fully TLS 1.2-compliant web server with SHA256 signed certs and ChaCha20-Poly1305 cypher suite. It's just a configuration option if you're doing it for the first time.