Glossary
Welcome to the Glossary! Whether you're already familiar with some of these terms or you're just becoming acquainted, our top-level glossary is a great resource for learning all of the relevant goods. Scroll through the full list below, search by term, or select by individual letter.
Zero-day Attack
A type of phishing attacks that has never or rarely been seen before, and thus are extremely difficult to detect and block using traditional signature-based inspection like Secure Email Gateways.