VPN Encryption — AES-256, ChaCha20, TLS 1.3, Perfect Forward Secrecy

What is VPN Encryption?

VPN encryption converts your internet data into unreadable ciphertext. It combines symmetric encryption (bulk data), asymmetric encryption (key exchange), hashing (integrity), and authentication (identity verification).

Neon Tunnel VPN uses: AES-256-GCM (OpenVPN) · ChaCha20-Poly1305 (WireGuard) · TLS 1.3 (V2Ray, Trojan, Vless) · HMAC-SHA256 (integrity) · Curve25519 ECDH (key exchange)

All encryption in Neon Tunnel VPN is military-grade — the same algorithms used by the US NSA for Top Secret data, financial institutions, and governments worldwide.

Symmetric Encryption — Bulk Data

Symmetric encryption uses the same key for both encryption and decryption. Used for encrypting VPN tunnel traffic (fastest method for large data volumes).

AES-256-GCM

Used by OpenVPN

Advanced Encryption Standard with 256-bit key and Galois/Counter Mode. NSA-approved for Top Secret data. 2^256 possible keys — brute force would take longer than the age of the universe.

256-bit key · AEAD · Hardware accelerated

ChaCha20-Poly1305

Used by WireGuard

Stream cipher by Daniel J. Bernstein. Faster than AES on devices without hardware AES acceleration. Combined with Poly1305 MAC for authenticated encryption. Used by Google, Cloudflare, TLS 1.3.

256-bit key · AEAD · Software optimal

TLS 1.3 AEAD

Used by V2Ray, Trojan, Vless

TLS 1.3 mandates AEAD ciphers only — AES-128-GCM, AES-256-GCM, or ChaCha20-Poly1305. Eliminates all older vulnerable cipher suites. Reduces handshake to 1-RTT.

128/256-bit · 1-RTT · Forward secrecy

Perfect Forward Secrecy (PFS)

Perfect Forward Secrecy ensures that even if an attacker records your encrypted VPN traffic today and later obtains the VPN server's private key, they cannot decrypt past sessions.

WireGuard: Rotates session keys every 3 minutes and at each handshake. Uses Noise Protocol Framework with ephemeral Curve25519 keys per session.
OpenVPN: Uses TLS_ECDHE_* cipher suites which mandate ephemeral key exchange. Combined with --reneg-sec 3600 for hourly key rotation.
TLS 1.3 (V2Ray, Trojan, Vless): PFS is mandatory — all TLS 1.3 connections use ECDHE for key exchange.

Encryption Summary Table

Algorithm	Type	Key Size	Used In	Security Level
AES-256-GCM	Symmetric AEAD	256-bit	OpenVPN	Military Grade
ChaCha20-Poly1305	Symmetric AEAD	256-bit	WireGuard	Military Grade
AES-128-GCM	Symmetric AEAD	128-bit	TLS 1.3, Vmess	Excellent
Curve25519 ECDH	Key Exchange	256-bit EC	WireGuard	128-bit equiv.
X25519 ECDHE	Key Exchange (PFS)	256-bit EC	TLS 1.3	PFS Mandatory
RSA-4096	Authentication	4096-bit	OpenVPN certs	Very Strong
HMAC-SHA256	Integrity/Auth	256-bit	OpenVPN	Collision resistant
BLAKE2s	Hashing/KDF	256-bit	WireGuard	Faster than SHA-256

Encryption at Admin Panel Level

Password hashing: bcrypt with cost factor 12 — resistant to GPU/ASIC brute force attacks
Database queries: PDO prepared statements — prevents SQL injection attacks
API tokens: Razorpay webhook signatures verified with HMAC-SHA256
HTTPS/TLS: All admin panel and API traffic served over TLS 1.3 (Hostinger enforced)
Session security: PHP sessions with session_regenerate_id() on login, HttpOnly + Secure cookie flags
Payment data: No card data stored server-side — processed through PCI-DSS certified gateways (Razorpay, Stripe, PayPal)

For complete details on admin panel security, see our Security Policy page.

MENU

VPN Encryption Explained

What is VPN Encryption?

Symmetric Encryption — Bulk Data

Perfect Forward Secrecy (PFS)

Encryption Summary Table

Encryption at Admin Panel Level

Quick Intro (Optional)