3 letters captcha

Creating a 3-letter CAPTCHA involves generating random combinations of three letters that users must input correctly to verify their identity. Here's an example of content for a 3-letter CAPTCHA:

1. CAPTCHA Image:

Display an image containing three randomly selected letters, such as "A," "B," and "C." Make sure the letters are presented in a clear and easily readable format.

2. Audio Option:

For users with visual impairments or difficulty reading the letters in the image, provide an audio option. Create an audio recording where a synthetic voice clearly pronounces the three letters.

3. Prompt:

Add a prompt above the CAPTCHA image or audio player to instruct users on what they need to do. For instance, you can have a message like: "Please enter the three letters shown above."

4. Input Field:

Provide an input field where users can enter their response. Keep the input field simple and make sure it allows for easy typing of three letters.

5. Validation:

Implement a validation mechanism to check if the user's input matches the correct combination of letters shown in the CAPTCHA image or audio. The validation should be case-insensitive to avoid confusion.

6. Error Handling:

Consider providing error messages for users who enter incorrect CAPTCHA responses. The error message should be informative and instructive, guiding users on how to try again correctly.

Remember to regularly update the CAPTCHA system to avoid pattern recognition and maintain its effectiveness in preventing automated bots from abusing your system. Additionally, ensure that the CAPTCHA is not overly challenging for legitimate users while still being sufficiently robust against automated attacks.