在移动应用程序和Web应用程序中输入验证码(Captcha in mobile application and web application)

我已经阅读了一些在手机应用程序中不需要验证码的网站。

我有些疑惑。

为什么在Web应用程序中需要验证码，而在访问相同应用程序的移动设备中不需要验证码？

I have read some web site that captcha is not needed in mobile application.

I have some doubts.

Why captcha is needed in a web application and not needed in a mobile that access the same application?

最满意答案

首先，创建一个抓取Web（ 包括Web应用程序 ）和提交表单的机器人相对比较简单。 这是一个经典的CAPTCHA解决方案。

在本地应用程序中自动提交数据相对较难。 这是因为你不能只编写一个自动脚本来发现源代码中的 <form>元素，然后模仿表单提交 。 此外，您需要（购买和）安装应用程序（在物理设备上或在模拟器中）。

作为一个侧面提示：移动设备的网络应用程序可以做很多事情来使CAPTCHA过程更简单。 想到不同 版本的滑块 CAPTCHA。

First off, it is relatively simple to create a bot to crawl the web (including web applicati) and submit forms. This is where a classic CAPTCHA solution comes in.

It is comparatively harder to automate data submission within native apps. This is due to the fact that you cannot just write an automated script to discover <form> elements within the source code and then mimic form submission. Also, you'll need to (purchase and) install the application (on a physical device or in a simulator).

As a side note: web applicati for mobile devices can do a lot to make the CAPTCHA process simpler. Different versi of slider CAPTCHA's come to mind.