Dual-hop architecture is a traffic-routing design that sends a connection through two separate relays before it reaches its destination. The first relay should know who is connecting but not where they are going; the second should know the destination but not the original source. By splitting knowledge across hops, the system reduces the chance that any single operator can correlate a user’s identity with their browsing or connection target.
In cyber security, this pattern matters for privacy networks, anonymizing proxies, and some secure messaging or telemetry systems. It helps limit tracking, metadata collection, and attribution, especially when an attacker or service provider tries to link source IP addresses to destinations. In real attacks, a weakness such as a proxy bypass, misrouted request, or browser bug can defeat the separation and expose the real IP or endpoint. Defenders use dual-hop designs to reduce trust in any one relay, but the protection depends on every traffic path staying inside the intended chain.