🔒 Zero-knowledge · Consent-based

Your devices. Your keys. Your control.

Ervun is a zero-knowledge anti-theft and remote-control system for the devices you own. Lock, locate, capture, transfer files, and wipe — all from your phone. Your passphrase never leaves your hands.

Client-side encryption You hold the keys Signed commands
ERVUN
🔒 Zero-Knowledge 🔑 You hold the keys
Sign in
Unlock your encrypted vault.
you@example.com
••••••••••••  👁
Sign in & unlock vault
your passphrase never leaves this device
01 What Ervun is

Your phone becomes the key to every computer you own.

Install a tiny agent on your PC. Enroll it with a one-time code. From that moment, your phone can lock it, find it, see it, and wipe it — from anywhere on Earth. And because everything is sealed with keys only you hold, nobody else can. Not thieves. Not hackers. Not even us.

Anti-theft Remote control Zero-knowledge
02 When you'll need it

Three moments Ervun was built for

One day your stomach will drop. Here's how that day goes with Ervun on your phone.

Café, downtown

You look up — your bag is open and the laptop is gone. You open Ervun and hit Lock. Ten seconds later it's a sirening brick flashing your phone number, wherever it is.

Remote lock + alarm
Monday standup

The deck you finished at midnight is on the PC at home. You browse its drive from your phone and pull the file. It arrives encrypted end-to-end — before your coffee cools.

Secure file transfer
Away for the weekend

Did you leave the studio PC rendering? One tap on Screenshot and you're looking at its screen from 300 km away. All good. Sleep easy.

Screenshot & webcam
03 Try it — right now

You're holding the remote.

This is a live simulation of Ervun. Send a command from the phone and watch it cross the relay to the laptop. Flip on Server X-ray to see the only thing our relay ever sees.

ERVUN · Controller
My Laptop — online
MY-LAPTOP · Windows 11
SIGNATURE INVALID
Live activity log

    A simulation — no real devices were harmed. The real thing works exactly like this, from anywhere.

    04 Set it up in minutes

    Three steps to full control

    Your account stores only ciphertext — no passwords to hand over, no data to trust us with. You install, you enroll, you command.

    STEP 01

    Install the agent

    Download the signed Ervun agent onto your Windows PC and run it. One click — no Python, no setup, no fuss.

    Download for Windows
    STEP 02

    Enroll the device

    Open the app, generate a one-time code, and type it into the agent. The code is locked to that machine's hardware ID — it can't be replayed anywhere else.

    STEP 03

    Control from anywhere

    Lock, locate, capture, transfer, or wipe — instantly. Every destructive command is signed on your phone before your device will trust it. You just tried it above.

    05 Zero-knowledge, by design

    The server can't read your data.
    Not now, not ever.

    Ervun's relay is deliberately blind. Your passphrase becomes keys on your device, everything is encrypted before it leaves, and destructive commands are signed with your private key.

    • Your passphrase never leaves your device — keys are derived locally.
    • Vault items and files are encrypted client-side; the server stores only ciphertext.
    • Lock, wipe and other commands are signed on your phone and verified by the device.
    • Even a fully compromised server can't decrypt, lock, or wipe your machine.

    What you send

    “Lock my laptop.”
    ✓ signed with your private key

    What our relay sees

    gAAAAB9xkQ2vRw7nT4pLzYx8mJfKcW3sD1hQaZ0uVeI6oNbXrE5tMyG= ✗ cannot decrypt · no keys · no plaintext — ever
    06 Everything, from your pocket

    Built for the moment it matters

    Lost your laptop? Left a file behind? Want to check in? Ervun turns your phone into a remote for the devices you own.

    Remote lock & alert

    Instantly lock a stolen or misplaced device and blast an on-screen message and alarm so it can't be used or ignored.

    Locate on demand

    Find where a device is right now, so you know whether it's down the couch or across town.

    Screenshot & webcam

    Capture a screenshot or a webcam photo on demand — see exactly what's happening, or who has it.

    Secure file transfer

    Pull a file you forgot from your PC, or push one to it — chunked and encrypted end-to-end, both ways.

    Encrypted vault

    Captures and transferred files land in a vault only your passphrase can open. Not us. Not anyone.

    Direct device chat

    Send a message straight to a device over a secure channel — leave a note for whoever finds it.

    Scheduled commands

    PremiumQueue actions to run later, or on a delay — control that works even when the device is offline right now.

    Remote wipe

    If a device is truly gone, wipe it. The command is cryptographically signed by you — no one else can trigger it.

    Full activity log

    Every command and result, timestamped. Know what was done, when, and whether it landed.

    07 Get started free

    Download Ervun

    Get the controller app on your phone, then install the agent on each PC you want to protect.

    The controller app

    Your command center — enroll devices, send commands, browse your vault, and manage everything. Coming soon on Android; iOS to follow.

    The Windows agent

    Runs quietly on each PC you own, executing your signed commands. One click to install — no Python, no fuss.

    Download for Windows
    Windows 10 / 11 Signed by LeyLance Auto-updating
    We'd love to hear from you

    Get in touch

    Questions, feedback, or need a hand getting set up? Send us a note and we'll get back to you.

    Email us
    support@ervun.com
    Support
    Setup help, enrollment, and troubleshooting
    Built by LeyLance
    Privacy-first software for the things you own