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Qualcomm · Security · Filed Dec 13, 2024 · USPTO published Jun 18, 2026 · Jun 18 release

Qualcomm Patents a Security Screen That Blocks Manipulated Instructions Sent to AI Systems

When someone tries to trick an AI model by slipping hidden instructions into a query, Qualcomm wants a gatekeeper to catch it before the model ever sees it.

By · Updated · 3 min read

Qualcomm Patent: Blocking AI Prompt Injection Attacks, figure from US 2026/0172433 A1
Figure from the official USPTO publication.
Publication number
US 2026/0172433 A1(US20260172433A1)
Applicant
QUALCOMM Incorporated
Filed · Published
Dec 13, 2024 · Jun 18, 2026
Inventors
Anantharaman BALASUBRAMANIAN, Jonathan PETIT, Jean-Philippe MONTEUUIS, Cong CHEN, James Randall EZICK
Status when we published
Approved; patent expected soon
Document
20 claims
US classification
726/23
Examiner
HERZOG, MADHURI R (Art Unit 2438)

What Qualcomm's prompt-tampering defense actually does

Imagine an AI assistant built into an app on your phone. Now imagine a bad actor crafting a specially worded message designed to make that AI ignore its rules and do something it shouldn't — leak data, impersonate someone, or skip safety checks. That's called a prompt injection attack, and it's one of the more pressing security headaches in AI right now.

Qualcomm's patent describes a system that intercepts every question or command sent to an AI before it reaches the model. It breaks the incoming request apart, checks the pieces for known attack patterns, and only lets the clean version through.

Think of it like a mail scanner that opens every package, checks it for contraband, and reseals the safe ones before delivery. The AI model itself never has to deal with the dangerous stuff — the filter handles it upstream.

How the key-value scanner flags malicious queries

The patent describes an attack detection layer that sits between the user and an AI model's interface (called an API — essentially the doorway through which requests reach the model).

When a query arrives, the system:

  • Parses it into key-value pairs — structured chunks of data like "instruction: summarize this document" or "role: system administrator"
  • Analyzes each pair against criteria for known attack signatures (things like attempts to override system instructions or inject unauthorized commands)
  • Passes the query through to the AI only if no attack pattern is detected

The core idea is to inspect the structure of a request, not just its surface text. Prompt injection attacks often work by abusing the way AI models parse formatted input, so catching problems at the structural level — before the model processes natural language — is a more reliable defense than asking the model itself to notice something is wrong.

The patent doesn't specify a single detection algorithm, leaving room for rule-based checks, machine-learning classifiers, or a combination. The architecture is agnostic to the model underneath.

What this means for AI security on Qualcomm chips

Prompt injection is already being used against real AI products today. As AI assistants get embedded into phones, cars, enterprise tools, and IoT devices — many of them running on Qualcomm silicon — securing the input layer becomes as important as securing the model itself. A compromised prompt can bypass guardrails that took months to train.

For Qualcomm specifically, this fits a clear strategy: the company wants its chips to run AI locally on devices rather than in the cloud. If on-device AI is the pitch, then on-device security has to come with it. A filtering layer that runs directly on hardware before reaching the model would be a natural part of that stack — and a selling point for enterprise customers who can't afford a compromised AI agent.

Source: US 2026/0172433 A1 at the USPTO (PDF). Full patent text and figures are in the official publication.

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