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Security, in plain English
Guides and research on keeping AI apps safe, written for people without a security team.
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How a drawer of old phones became heySec Home
Most homes already own the parts of a security system: old phones, tablets and laptops, and smart sensors on the walls. heySec Home started as one household putting them to…
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Prompt Injection, Made Simple
Prompt injection occurs when hidden commands in untrusted text trick an AI into ignoring its instructions. It is…
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Prompt injection 101 for the LLM apps you’re shipping
If your application feeds outside text like emails or web pages to a language model, it is vulnerable…
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What is prompt injection, and how do you stop it?
An AI assistant follows the instructions in the text it reads. That is also its weak spot. Here…
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A Plain-Language Security Checklist for Developers Shipping LLM Apps
An LLM application security checklist in plain language. Seven practical, do-this-today steps to secure RAG pipelines, AI agents, and chatbots before you…
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What prompt injection is, and why Microsoft is filing CVEs
Prompt injection is when text your AI reads becomes commands it follows. Microsoft is now filing CVEs for it. Here is what…
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Your scans are clean. Do you know your AI’s exposure?
Your scanners keep the dashboard green, but they were never built to check the text your AI reads. Here is a 15-minute…
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Microsoft put CVEs on prompt injection. Here’s containment.
Microsoft recently published security flaws proving that prompt injection in AI agents is now a serious execution risk. To address this, heySec…
Make your AI safe to read the real world
Prompt Firewall is in private testing. One API call gives you scanning and containment from day one.