Tagged articles

CAPTCHA

103 articles · Page 2 of 2

Dec 5, 2016 · Artificial Intelligence

Understanding Convolutional Neural Networks for OCR and CAPTCHA Recognition

This article introduces the fundamentals of neural networks for image recognition, explains regression vs classification, describes convolution, pooling and fully connected layers, illustrates the classic LeNet‑5 model on the MNIST dataset, and shows how a TensorFlow‑based CNN can be trained to recognize CAPTCHA images, achieving high accuracy.

CAPTCHACNNLeNet-5

0 likes · 10 min read

Understanding Convolutional Neural Networks for OCR and CAPTCHA Recognition

Java High-Performance Architecture

Oct 6, 2015 · Information Security

Understanding CSRF Attacks and How to Prevent Them

This article explains how CSRF (Cross‑site request forgery) tricks authenticated users into performing attacker‑controlled actions, illustrates a typical admin‑addition scenario, and outlines two primary defenses—CAPTCHA verification and dynamic token validation—to effectively mitigate such attacks.

CAPTCHACSRFCross-Site Request Forgery

0 likes · 3 min read

Understanding CSRF Attacks and How to Prevent Them

MaGe Linux Operations

Jul 1, 2014 · Backend Development

Master Python Web Scraping: Proxies, Login, Multithreading, and Captcha Hacks

This guide walks through practical Python web‑scraping techniques using urllib2, covering basic page fetching, proxy usage, cookie handling for logins, form submission, header spoofing, anti‑hotlink tricks, multithreaded crawling, and strategies for bypassing simple captchas, all illustrated with code snippets.

CAPTCHAProxyWeb Scraping

0 likes · 7 min read

Master Python Web Scraping: Proxies, Login, Multithreading, and Captcha Hacks