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NSure USIM

USIM-based zero trust security
for IoT devices

NSure USIM is a mobile device security solution that runs inside the USIM, not on the device OS. It continuously collects the device's network, cell and radio signal state from within the USIM, and AI computes a trust score for each device in real time, responding in stages according to the risk level.

Runs in
The USIM (Secure Element)
Decision model
Per-device trust score (0 to 100), computed continuously
Deployment
USIM swap, no additional hardware
Network integration
Standard interfaces of the existing mobile network
The problem

More IoT devices, bigger security blind spots

IoT devices on mobile networks, such as service robots, unmanned equipment and sensor terminals, share three structural constraints.

  • 01

    Security apps are hard to install

    There is no screen or input device, and storage and compute are limited. There is simply no room for antivirus or MDM software.

  • 02

    OS-dependent security has limits

    Security apps run on top of the device OS. If the OS is compromised or its privileges are taken over, every security function above it goes down with it.

  • 03

    Nobody is on site

    Devices are scattered across unmanned locations, so there is no user to notice anything unusual. When a breach happens, detection and response come late.

When the OS falls, every defense above it falls too

Once the OS is infected, rooted or hijacked, an attacker can switch off or bypass any security layer sitting on top of it.

Security apps · Antivirus · MDM Run on the OS
Device OS Primary entry point for attacks
Hardware · Cellular modem

Real threats in mobile environments

  • Rogue base stations (fake gNB)

    Devices are lured onto a fake base station to intercept traffic or disrupt service.

  • USIM cloning and theft

    A device's cellular identity is cloned and abused for billing fraud or impersonated access.

  • Abnormal location and access patterns

    A hijacked device operates at times, locations or along routes outside its normal range.

Why USIM

Move security enforcement from the OS to the USIM

The USIM is trusted hardware (a Secure Element) already present in every device. It is issued and managed by the carrier, resistant to forgery and tampering, and operates independently of the device OS.

  • 01

    Already in every device

    No additional hardware. NSure USIM uses the USIM every mobile device already carries. Swapping the USIM is the deployment process.

  • 02

    Runs independently of the OS

    Security logic executes inside the Secure Element. Even if the OS is compromised or bypassed, state collection and policy enforcement continue.

  • 03

    Observes the cellular layer directly

    Because it observes network attachment state and radio signal information directly at the cellular layer, it catches threats that are invisible at the application layer.

Why zero trust

From one-time authentication to continuous verification

Perimeter security and zero trust treat trust in fundamentally different ways. NSure USIM verifies the device for as long as it is in use, not just at the moment it connects.

From one-time authentication to continuous verification
Aspect Perimeter security (legacy) Zero trust (NSure USIM)
When trust is decided Once, at connection time Continuously, throughout use
Basis for the decision Credentials (who you are) Current device state (how you are right now)
Anomalies after authentication No means of detection Detected immediately by AI and reflected in the trust score
Response Block or allow Graduated response based on risk level
Architecture

Three components working as one security loop

A USIM zero trust architecture developed in-house by Netcube.

On-SIM security agent

Runs independently inside the USIM.

Continuously collects the device's network, cell and radio signal state and watches for anomalous events. Executes response policies from the server directly, without going through the OS.

Secure channel

Always-on, bidirectional.

Device state data flows up; response policies and execution commands flow down. It uses the standard interfaces of the existing mobile network, so no network changes are required.

NSure security server

AI analysis and policy decisions (PDP).

Analyzes collected data with AI to detect anomalies and continuously computes a trust score (0 to 100) for each device. Decides the response policy based on the score range.

Use cases

Where zero trust is needed most

The higher the security requirements and the more distributed and unmanned the operation, the greater the impact of USIM-based continuous verification.

  • Public sector · Defense unmanned systems

    Patrol robots, surveillance equipment, remote telemetry terminals

    Where high security requirements and unmanned operation overlap. Attempts to impersonate or hijack a device are caught early at the cellular layer.

  • Smart factory · Industrial IoT

    Production equipment sensors, AGVs, quality inspection systems

    A halted line can mean heavy losses. Because the response is graded by risk level, threats are managed without over-blocking.

  • Logistics · Vehicle M2M

    Fleet management terminals, logistics trackers, telematics

    Devices that move and spread across the country. Abnormal location and route patterns feed into the trust score to detect hijacking and misuse.

Considering NSure USIM
for your devices?

A free IP visibility assessment is not a big project. We agree the scope and timeframe, and you get numbers you can report to management.
Request a consultation and we will get back to you within 24 hours.