Client-side intelligence is the full analysis of everything happening in users' browsers, not just security threats, but all behavioral patterns, data flows, and interactions. Current use cases include fraud detection through device fingerprinting, chargeback prevention, ad fraud protection, malware detection, privacy monitoring, compliance monitoring, and user behavior analysis. As web browsers become more sophisticated computing environments, client-side intelligence will become the foundation for understanding and protecting the entire user experience ecosystem.
Compromising a third-party service your website relies on is one common way attackers get in.
Firewalls, WAFs, and vulnerability scanners are traditional security tools used to protect your server, but they cannot see what's happening in your users' browsers.
Server-side security protects your infrastructure, while client-side security focuses on where your application actually runs, inside your users' browsers.
Client-side security is a critical subset of AppSec that focuses on protecting applications where they actually execute--in users' browsers.