# Password-based Authentication

Password-based authentication is a security mechanism where a user gains access to a system or application by entering a password that matches the one stored in the system's database.

```python
# Example of password-based authentication in Python

# Simulated user database
user_db = {"username": "user1", "password": "securepassword123"}

def authenticate(username, password):
    if username in user_db and user_db["password"] == password:
        return "Authentication successful!"
    else:
        return "Authentication failed!"

# User input
input_username = input("Enter username: ")
input_password = input("Enter password: ")

# Authentication check
print(authenticate(input_username, input_password))
```

This code snippet simulates a basic password-based authentication process by checking the entered username and password against a predefined user database.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://security.navidnaf.com/platform-9-3-4/auth-auth/authentication/password-based-authentication.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.