# How Remote Devices Prove They Have Not Been Tampered With

> A system for a remote device to prove to a central server that its internal security processes are running correctly without exposing sensitive raw data.

- **Patent:** US RE46915
- **Original title:** USRE46915E1 - Verification of process integrity
- **Owner:** Telit Automotive Solutions NV
- **Granted:** 2018
- **Status:** Active
- **Times cited:** 0
- **Field:** telecommunications, automotive, consumer_electronics

## What it does

The patent describes a way for a remote device, such as a vehicle tracker, to confirm its integrity to a server. The device processes input data using a secure, one-way hash function, which hides the actual content of the data while creating a unique fingerprint. This fingerprint is stored in a secure processor. When the server wants to check if the device is still secure, it sends a specific request. Only then does the device send back the stored fingerprint, allowing the server to verify that the device's security process hasn't been altered or bypassed.

## What it does NOT cover

- Does not cover systems that send verification data automatically without a specific request from the server.
- Does not cover methods where the raw input data is sent directly to the server for verification.
- Does not cover security processes that do not use a secure processor to derive verification information.
- Does not cover general data encryption that does not involve a server-side integrity check of the device's internal process.

## The clever bit

The system uses a 'pull' model for verification: the device remains silent until the server asks, and it only provides a cryptographic proof of its internal state rather than the sensitive data itself.

## Real-world examples

1. Connected vehicle telematics units
2. Remote industrial sensor arrays
3. Fleet management tracking hardware

## Why it matters

This technology is essential for the Internet of Things (IoT) and connected vehicles. It allows fleet managers or manufacturers to ensure that hardware hasn't been hacked or modified by malicious actors, which is critical for safety-sensitive systems like GPS tracking or autonomous vehicle telemetry.

## Frequently asked questions

### What does How Remote Devices Prove They Have Not Been Tampered With cover?

A system for a remote device to prove to a central server that its internal security processes are running correctly without exposing sensitive raw data.

### Who owns patent US RE46915?

Telit Automotive Solutions NV owns this patent, granted in 2018.

### When does this patent expire?

This patent is expected to expire on June 26, 2038, when the invention enters the public domain.

### What problem does this patent solve?

This technology is essential for the Internet of Things (IoT) and connected vehicles. It allows fleet managers or manufacturers to ensure that hardware hasn't been hacked or modified by malicious actors, which is critical for safety-sensitive systems like GPS tracking or autonomous vehicle telemetry.

### What does this patent NOT cover?

Does not cover systems that send verification data automatically without a specific request from the server.

**Full plain-English explainer:** https://patentbrief.org/patent/us/RE46915/google-photos

**Original patent:** https://patents.google.com/patent/USRE46915

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._