I am migrating a project from Java 6 to Java 11. In the project I have the following dependency:
com.octo.captcha
jcaptcha
1.0
I would like to replace it with more modern approach. I have found the reCaptcha library from google but I do not like to make http requests to any other external service. I would like to generate and validate the captcha in-place – inside my backend server.
Other libraries which I have found seem old also.
Is there any alternative for captcha library which can run on my backend Java server?