Due to their ubiquity in modern web browsers, anti- phishing blacklists are a key defense against large-scale phishing attacks. However, sophistication in phishing websites—such as evasion techniques that seek to defeat these blacklists—continues to grow.

Phishing attacks have reached record volumes in recent years. Simultaneously, modern phishing websites are grow- ing in sophistication by employing diverse cloaking techniques to avoid detection by security infrastructure.