Log into online banking once on public WiFi and your password may already be captured by another device on the same network. That is not fear-mongering; it is what happens daily in the era of plaintext HTTP. Users who choose Green Tea VPN want a layer of genuinely reliable encryption. This article explains how that encryption works and whether the security promise holds up.
Security is not a slogan like "military-grade encryption". It is the combined result of three things: encryption algorithm, log policy, and leak protection. Here is what Green Tea Accelerator does on each.
Encryption: why AES-256-GCM is widely trusted
AES-256 is the de facto standard for symmetric encryption. A 256-bit key space is 2 to the power of 256, making brute force computationally infeasible. GCM mode adds integrity checking on top of encryption, detecting any tampering.
| Algorithm | Key length | Mode | Security level |
|---|---|---|---|
| AES-128-CBC | 128-bit | No auth | Medium |
| AES-256-GCM | 256-bit | Authenticated | High |
| ChaCha20-Poly1305 | 256-bit | Authenticated | High |
Green Tea VPN's client enables AES-256-GCM by default, switching to ChaCha20-Poly1305 on mobile in some low-power scenarios. Both are well-vetted authenticated encryption algorithms.
Log policy: what zero-log means
Encryption protects the "transit process" but not whether the server records anything. The Green Tea VPN no-logs policy explicitly promises: no browsing history, no connection timestamps, no real IP or destination sites, and no traffic content storage.
| Data type | Recorded? | Purpose |
|---|---|---|
| Browsing history | No | β |
| Connection timestamps | No | β |
| Real IP | No | β |
| Account registration | Yes (minimal) | Account service |
To be clear, zero-log is not "full anonymity". Registration still requires a minimal email or phone number for password recovery, but that is decoupled from browsing behavior.
Leak protection: DNS and kill switch
No matter how strong the encryption, if DNS queries leak, your real intent is exposed. Green Tea VPN has built-in DNS leak protection that routes DNS queries through the encrypted tunnel, plus a kill switch that blocks the network on unexpected disconnect to prevent data exposure.
One user who often works in cafes shared: "With the old free tool, it was as if I wasn't connected β checking showed my IP never changed. After switching to Green Tea VPN, IP and DNS both show server addresses, which is reassuring."
Security is a combination of measures. Algorithm, logs and leak protection are all necessary, and this is what separates Green Tea VPN from many slogan-only free tools. To test your own connection security, start at the download center.