Tap Download for Android on your phone. If your browser asks whether to keep the
file, choose Download anyway. Browsers ask this about every app that does not come
from Google Play.
Install
Open the file when it has downloaded. The first time, Android asks whether your
browser may install apps: tap Settings, turn on Allow from this source, go back and
tap Install. If Google Play Protect offers to scan the app, let it.
Sign in
Open DeKoi and sign in with your Google account. The app then shows you how to set
up your DeKoi, one step at a time.
Prepare the memory card on a computer
The app can prepare your DeKoi's memory card with a USB card reader. You can also do it
with DeKoi Setup on a Windows computer.
Windows may say that it protected your PC, because DeKoi Setup is not signed with a
certificate yet. Choose More info, then Run anyway.
Inside the app
Once your DeKoi is plugged in, the app shows what it sees on your network, in plain
words. Quiet days stay quiet. When something touches the decoy, you get an alert with
clear steps.
15:13
DeKoi
01 / Status
All clear
Nothing unusual in the last 24 hours.
02 / At a glance
Devices on your network183 new this week
Alerts in 7 days2
Your DeKoiOnlineChecked in 1 min ago
What DeKoi watches
All 8 checks on
Quiet days
One look says whether all is well. The ring stays green while nothing has touched your
DeKoi.
15:13
Network
18 devices · 3 new this week
MapRoomsList
Shows the devices your DeKoi can see, not how they are connected.
Your network on a map
Every device your DeKoi can see, around your router, with what each one looks like.
New devices are marked.
15:13
Act now
A laptop tried to sign in to your DeKoi
Someone may be trying to get into the devices on your network.
Today · 1 time · 15:13
Is this a real threat?
Very likely an attack
Do this now
Find the device. It looks like a computer.
2Unplug its network cable or turn off its Wi-Fi.
Alerts with clear steps
When something touches your DeKoi, you get an alert in plain words, usually within
seconds, and what to do about it.
15:20
Features
All 12 features are on.
Decoy company server
Shows up on your network as SAP-PAY-PROD
Touched 2 times in the last day
On · 13 decoys running
Intrusion detection
On · 48,213 attack patterns
A decoy worth breaking into
Your DeKoi shows up as a small company's finance server. Nothing in your home has a
reason to open it, so anyone who does gets noticed.
15:21
Your DeKoi
DeKoiOnline · Checked in 1 min ago
01 / What DeKoi watches
All 8 checks on
13 decoys running
Checking traffic against 48,213 known attack patterns
Watching for devices searching for openings
Watching for devices pretending to be others
Watching for devices posing as your router
Watching for copies of your Wi-Fi
Always watching
Every check your DeKoi runs, live: intrusion detection, scans, devices posing as your
router, copies of your Wi-Fi.
15:22
Insights
99.4%
Internet worked in 167 of 168 hours
7 days agoNow
01 / Internet
Your routerUsually 2 ms, 0% lost
The internetUsually 14 ms, 0% lost
Web address lookupsUsually 9 ms, 0% lost
02 / Web addresses
Web addresses lead where they should.
Your internet, checked
How much of the week your internet worked, and whether web addresses lead where they
should.
About the project
DeKoi was made by team CyberFish during the Oslo Sprint 2026 Hackathon. The code for the
DeKoi itself, the app, DeKoi Setup and this site is in one repository on GitHub.
