Final Answer:
A minimum of 3 out of 4 password complexity rules must be implemented before any change can be saved.
Step-by-step explanation:
Implementing password complexity rules significantly enhances security. These rules typically encompass aspects like uppercase letters, lowercase letters, numbers, and special characters. Requiring a minimum of 3 out of these 4 rules ensures a stronger password, compelling users to create passwords that incorporate a diverse combination of characters.
This approach aims to bolster security by mandating a certain level of complexity in passwords, making them less susceptible to brute-force attacks or easy guessing. By setting this criterion, users are encouraged to craft more robust passwords, contributing to the overall resilience of the system against unauthorized access or breaches.
This strategy strikes a balance between security and usability, promoting stronger authentication practices without overly burdening users with excessively stringent requirements.