SENTINEL CLOUD CORE v2.0
CORE ONLINE | TLS 1.3
🛡️ ZERO-KNOWLEDGE CRYPTOGRAPHIC CORE

Military-Grade Cloud Vault
for Two-Factor Authentication

Self-hosted, end-to-end encrypted TOTP & HOTP authentication infrastructure. Engineered with client-side master key isolation, hardware-backed Android KeyStore, and strict APK attestation.

Download Sentinel APK Explore Cryptography ↓
sentinel-core-monitor --telemetry
[SYS] Sentinel Security Kernel v2.0 initialized on hardened enclave.
[OK] TLS 1.3 Handshake verified (Let's Encrypt Authority X3).
[OK] Zero-Knowledge Vault Merging Engine active (AES-256-GCM / 100k iters).
[SEC] APK Hardware Attestation: ENFORCED (HMAC-SHA256).
[NET] Direct unauthorized REST probes blocked: HTTP 403 Forbidden.
[LIVE] Telemetry monitoring active...

Zero-Knowledge Architecture

Encryption keys are derived locally on your device via PBKDF2 (100,000 iterations). The server only stores ciphertext blobs; nobody—not even server administrators—can access your OTP keys.

APK Attestation & HMAC-SHA256

All API communication is cryptographically signed using a private application key and anti-replay timestamps. Arbitrary browser requests, bots, or third-party crawlers are completely blocked from accessing your vault.

100% Offline Capability

Generates RFC 6238 TOTP and RFC 4226 HOTP codes completely offline without requiring internet access. Cloud backup is entirely optional and seamless.

Ready for true security?

Download the official Sentinel Authenticator Android binary. Compiled with Clean Architecture, Jetpack Compose, Room, and Hardware KeyStore integration.

Android 8.0+ Architecture: ARM64 / x86_64 Format: Standalone APK Zero Telemetry
Download APK (3.4 MB)