Technical Specifications
- Bypass Protocol
- Stealth (XOR) — Insufficient
- Success Rate
- 0-5% (Blocked)
- GFW Resistance
- Failed (Entropy Detected)
- Privacy Trust
- 10/10 (Swiss Jurisdiction)
- Price
- $4.99/month (2yr plan)
- Refund Policy
- 30-Day Guarantee
The Privacy Giant's China Problem
Proton VPN is a global leader in privacy. Swiss jurisdiction, open-source clients, and a proven track record of protecting journalists and activists worldwide. However, privacy excellence and China connectivity are different challenges.
Proton's "Stealth" protocol was designed to bypass government firewalls—and it works well in Russia, Iran, and other restrictive regions. But China's Great Firewall is a different beast, employing AI-driven heuristics that Stealth cannot defeat.
Why Stealth Protocol Fails in China
Proton's Stealth protocol uses XOR-based packet scrambling over OpenVPN. This approach works against firewalls that look for specific protocol signatures. China's GFW, however, uses entropy analysis—measuring the randomness of traffic patterns.
Entropy Detection
XOR scrambling changes the byte patterns but doesn't change the entropy profile of the traffic. China's AI classifiers detect the inconsistent entropy shifts that Stealth creates, triggering instant TCP RST packet injection.
Strengths and Limitations
Strengths (Global Privacy)
- ✓ Swiss jurisdiction: Strong privacy laws
- ✓ Open source: Fully auditable clients
- ✓ Works in Russia/Iran: Stealth effective elsewhere
- ✓ Proton ecosystem: Mail, Drive, Calendar integration
Limitations (China)
- ✗ Stealth fails: XOR insufficient for GFW
- ✗ Entropy detected: AI heuristics catch patterns
- ✗ 0-5% success: Essentially non-functional
- ✗ No China-specific solution: Unlike competitors
Privacy vs China Connectivity
If you value Proton's privacy philosophy but need to work in China, you'll need a different approach:
- Use Proton outside China for maximum privacy protection
- Use a China-specific VPN (Astrill, LetsVPN) for GFW bypass
- Consider eSIMs for hardware-level bypass without software detection
Recommendation
For China connectivity, Astrill VPN achieves 98% uptime with StealthVPN protocol. You can layer Proton VPN over your connection outside China for additional privacy.