Is data sent to backend functions securely?

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1

I’m implementing a custom login and I’m wondering if I send the user’s email/password to a backend function, if this information is passed in a secure (encrypted) way from the front end to the backend.

Is there a recommended way for how to securely handle user passwords and sensitive information? I’m using a third party authentication so at the moment I’m sending email/password to a backend function where the login is done using the 3rd party system.

Thanks

2

Passwords are encrypted, not sure about text strings, if you’re passing info to backend it is safe to do so, however keep in mind that anyone can call a backend function even with different data and see it’s return value.