𝗛𝗼𝘄 𝗡𝗼𝘁 𝘁𝗼 𝗕𝘂𝗶𝗹𝗱 𝗮 𝗟𝗼𝗴𝗶𝗻 𝗦𝘆𝘀𝘁𝗲𝗺

𝗛𝗼𝘄 𝗡𝗼𝘁 𝘁𝗼 𝗕𝘂𝗶𝗹𝗱 𝗮 𝗟𝗼𝗴𝗶𝗻 𝗦𝘆𝘀𝘁𝗲𝗺

Stop building simple login systems. Secure authentication is not enough. You need extra layers.

Put a CAPTCHA on your signup form. This stops bots from making fake accounts.

Do not put a CAPTCHA on the login page for everyone. It ruins the user experience.

Instead, track failed login attempts. Show the CAPTCHA after 3 to 5 failures. This stops brute force attacks.

Store these attempts in a database. Do not rely on cookies. Attackers change cookies. A database tracks users across different devices.

Track users by email, IP, or phone number.

Use a table with these fields:

• ID
• Email
• IP
• Count
• Timestamps

Take these steps after 5 failed attempts:

• Force a CAPTCHA until the user logs in.
• Lock the form for a set time.
• Block the account and force a password reset.

Mix and match these methods to fit your needs.

Source: https://dev.to/juddee/how-not-to-build-a-login-signup-system-4fc5