Security & Trust

How we protect
what you trust us with.

Sentinel was built by people who don't trust software either. Here's exactly what we do, what we don't do, and what we promise — in plain language.

🚫What we never collect

Sentinel ships with zero telemetry. No analytics SDKs, no crash reporters that phone home, no usage metrics, no device fingerprints sent to a server. The list of things we don't collect is the entire list of things you might worry about:

If the network were cut after Sentinel finished installing, the app would continue working indefinitely. That's the point.

🔐Encryption & key handling

Every sensitive operation in Sentinel uses authenticated encryption with hardware-backed keys where available, falling back transparently and reporting clearly when it can't.

AES-256-GCM

All vault data and persisted secrets use AEAD with per-record nonces. No deprecated modes anywhere.

StrongBox-first

Keys live inside the device's hardware security chip when supported (Pixel 3+, modern Samsung, OnePlus, etc.).

PBKDF2 310k rounds

Master password derivation uses OWASP-current iteration counts. Brute-forcing a strong password is computationally infeasible.

Class A storage

Keys clear from memory when the screen locks. An attacker with physical access after lock has nothing to extract.

🪪Device-bound licensing

Your license is cryptographically tied to your specific hardware at issuance. This protects you and us — a leaked license can't be reused on another device, and you don't need to log in or maintain an account just to keep using software you paid for.

🎯Our threat model

Honesty matters more than marketing. Here's what Sentinel is and isn't designed to defend against.

Designed to defend against

Logical USB/ADB extraction · Stalkerware and hidden accessibility services · Spontaneous device seizure · Unencrypted photo metadata · Network downgrade attacks · Unauthorized reboots

Not designed to defend against

Targeted zero-day exploits from nation-state actors · Physical chip-off attacks · Compromised firmware shipped from the factory · Coerced password disclosure · Adversaries with arbitrary code execution before install

Any privacy tool that claims total protection against every threat is lying to you. We'd rather tell you exactly where the line is.

🔍Auditability

Every root command Sentinel executes is logged locally to an append-only file you can inspect at any time. Nothing happens on your device that you can't see exactly what happened, when, and why.

⚖️Legal & data handling

Sentinel is built and operated by a small independent team. We're not subject to bulk-data programs because we don't have your data to hand over. The complete contents of our database that relate to you are: your buyer name, email, device identifier hash, and license issuance timestamp — and only because we need them to verify your purchase.

Questions? Audit requests? Bug reports?

Reach security@sentinelprivacy.xyz — we read every message.

← Back to Sentinel