Shadowsocks is a secured SOCKS5 based protocol designed for censorship evasion. It uses strong encryption (like AES-256-GCM or Chacha20) and traffic obfuscation to bypass deep packet inspection, making it harder for firewalls to detect. 
Unlike other VPN protocols, it only routes selected traffic, resulting in lower latency and higher speeds, ideal for accessing restricted content in high-censorship regions.
Here is a guide how to connect to TrustZone VPN servers using ShadowSocks protocol. en savoir plus...