While often called a VPN, Psiphon 3 is technically a that uses a multi-layered approach:
The city was gray, not just from the concrete and the rain, but from the information. The government had spent a decade building the Great Static, a sophisticated firewall that scrubbed the internet clean of "destabilizing elements." History was edited in real-time; news was a monologue; and the outside world was a flickering ghost. psiphon 3 exe
Standard VPNs are easily blocked because their packets contain recognizable handshakes. The psiphon 3 exe employs advanced obfuscation (e.g., "Obfuscated SSH" and "Unreliable" transports) that make your encrypted traffic look like standard HTTPS web browsing. This is critical for users in restrictive regions like China, Iran, or Russia. While often called a VPN, Psiphon 3 is