24/7 connected lockers
A twelve-cell steel locker, connected over Ethernet and 4G, able to validate a code offline when the network drops.
Locker economics
Adjust the rent and the costs: margin, payback and threshold recompute.
Monthly lease payment
€61.30
80 % × 3 200 € · 48 mois · 7 %
Monthly margin
€45.70
Own equity recovered in
14 months
Margin after 48 months
€107.00
The lease is paid off: the locker costs only its operation.
240 theoretical movements, 168 expected drop-offs at 70 % utilisation.
Demonstration
A code is generated server-side, then verified exactly as the locker would, offline.
Failed attempts: 0 of 5
What is not
- A six-digit code stays six digits long. Its resistance comes from the lockout, not from entropy.
- It is the second factor — a signed QR code bound to the customer's phone — that actually prevents an observed code from being shared.
A floor rent keeps the locker profitable everywhere
| Zone | Local rent | Margin | Verdict |
|---|---|---|---|
| Western Europe | €129 | €46 | Profitable |
| North America | €129 | €46 | Profitable |
| Oceania | €129 | €46 | Profitable |
| East Asia | €129 | €46 | Profitable |
| Eastern Europe | €129 | €46 | Profitable |
| South-East Europe and Caucasus | €129 | €46 | Profitable |
| China and Mongolia | €129 | €46 | Profitable |
| Middle East and North Africa | €129 | €46 | Profitable |
| Latin America | €129 | €46 | Profitable |
| Pacific Islands | €129 | €46 | Profitable |
| South-East Asia | €129 | €46 | Profitable |
| Central Asia | €129 | €46 | Profitable |
| Sub-Saharan Africa | €129 | €46 | Profitable |
| South Asia | €129 | €46 | Profitable |
Rent floor that keeps the margin positive everywhere: €98.
What is guaranteed
- Every locker holds its own key, derived from the master key. Compromising one locker does not compromise the fleet.
- The code is bound to the locker, the cell, the booking, the purpose and a 24-hour slot.
- Verification works offline: the locker decides without the network, which is what 24/7 actually requires.
- Lockout after five wrong attempts, constant-time comparison, logging to the SIEM.
What is not
- A six-digit code stays six digits long. Its resistance comes from the lockout, not from entropy.
- It is the second factor — a signed QR code bound to the customer's phone — that actually prevents an observed code from being shared.
- Across a whole fleet, the risk is no longer nil: 0.96 cell a day in expectation if the entire fleet were attacked at once.
Probability a brute-force attack succeeds on one cell
0.0010%
5 / 1,000,000
Specifications
| Element | Specification |
|---|---|
| Structure | 1.5 mm steel, 12 modular cells (4 large, 8 standard), IP54 outdoors |
| Controller | ARM SoC with neural unit, TPM 2.0, secure boot, encrypted storage |
| Locks | Electromechanical with door-state sensor, sealed emergency release |
| Connectivity | Ethernet and multi-operator 4G/5G, automatic failover |
| Vision | Camera per column, lighting, front surveillance camera |
| Power | Mains plus 12 V 100 Ah LiFePO4 battery, solar option |
| Certifications | CE, UKCA, FCC, IC, RoHS, WEEE and local equivalents |
Battery autonomy
Usable energy
864 Wh
| Mode | Autonomy |
|---|---|
| Active standby | 19.2 h |
| Heavy use | 10.8 h |
| Degraded mode | 34.6 h |
Screen off, camera on demand: enough to ride out a full night's outage.