Mode 01
Standard
Protection veil visible, password field shown. Intensity adjustable from 15 to 70 per cent.
The product
A Windows application that shows the real state of your protection.
ScreenShield21 brings system state, protection mode, access methods, paired devices, and recovery paths together in a single local application.
See before you act
Home puts the protection posture first: what is active, how you will unlock, and how long before protection arms itself.
- A state readable in one sentence, not a noisy dashboard.
- The protection mode is changed before the next protection starts.
- Automatic protection arms after an adjustable delay from 30 seconds to 1,440 minutes.
- A keyboard shortcut you choose protects the screen instantly.
The mode: what appears while protected
Three behaviours, chosen according to where you work.
Mode 02
Hidden background
Screen masked, opaque by design. Intensity adjustment is deliberately disabled in this mode.
Mode 03
Discreet
Password field entirely hidden on the lock screen, revealed by your shortcut.
The level: how much proof to unlock
You configure the level from the registered independent families. At unlock, ScreenShield21 evaluates their availability and validates the required proofs.
1
Standard
One valid verification is enough. Recommended for personal use.
2
Enhanced
Two independent methods are required, in any order you choose.
3
Maximum
Three independent methods are required. Four registered families are recommended.
Mode and level are two separate settings: the mode decides what is displayed, the level decides what must be proven.
Four families of access methods
Each row is a distinct family. A registered family stays configured even when it is temporarily absent.
- Password — verified locally, mandatory fallback method.
- FIDO2 security key — possession verified cryptographically before any trust.
- Trusted device — a paired phone, with its own permissions.
- Recovery media — persistent registration, detected presence, and explicit use.
Discreet mode confirms before it activates
Hiding the password field is useful, but dangerous if you forget how to bring it back. The application refuses to enable the mode until you have reproduced the shortcut yourself.
- The reveal shortcut is shown in plain sight before activation.
- You must reproduce it to prove you know how to return to normal input.
- An incorrect combination leaves the mode disabled.
- The password stays verifiable even while the field is hidden.
Settings that actually exist
- Automatic protection
- Adjustable delay, permitted values from 0.5 to 1,440 minutes.
- Protection shortcut
- Configurable combination to protect the screen instantly.
- Overlay intensity
- From 15 to 70 per cent, in Standard or Discreet mode.
- Visual ambience
- Five levels, from Disabled to Ultra, plus a reduced-motion option.
- Interface sounds
- Short protection and unlock signals, removable, with adjustable volume.
- Interface language
- French or English, applied across the interface at next start.
- Start with Windows
- Option to make protection available as soon as you sign in.
- Activity and diagnostics
- Local log and advanced mode, with no transmission outside.
What ScreenShield21 is not
The scope is deliberately narrow, and written here to avoid any ambiguity.
Not an antivirus
No file scanning, no malware detection.
Not a VPN
No encryption of your browsing or general network traffic.
Not enterprise identity management
No directory, no federation, no fleet administration.
Not absolute protection
An adversary who already holds administrator privileges, or prolonged physical access, is outside the scope.