Steven Foerster

Lab

Lab

Interactive playgrounds, visualizers, and security demos built to be poked, prodded, and occasionally broken.

What this is

This is my public lab notebook in runnable form: prompt injection visualizers, memory corruption simulations, deterministic threat modeling, and cryptography demos. Most tools run fully in your browser.

Try breaking things. Seriously. If you find edge cases or bugs, open an issue or send me a note.

AI & Machine Learning

Interactive visualizations for understanding how AI systems work.

AI & Machine Learning

Embedding Space Explorer

Visualize how AI understands meaning through vector similarity and semantic clustering.

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AI & Machine Learning

Classifier Threshold Lab

Drag a decision threshold across score distributions and watch precision, recall, and ROC curves update in real time.

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AI Safety & Red Teaming

Interactive demos for understanding AI vulnerabilities and adversarial techniques.

AI Safety & Red Teaming

Prompt Injection Visualizer

Interactive demo of prompt injection attacks with visual breakdowns and defense patterns.

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AI Safety & Red Teaming

System Prompt Architect

Guided step-by-step builder for LLM system prompts with security hardening and live preview.

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AI Safety & Red Teaming

Jailbreak Sandbox

Test jailbreak techniques against progressively hardened defenses with simulated model responses and scoring.

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AI Safety & Red Teaming

RAG Poisoning Simulator

Inject adversarial documents into a simulated RAG pipeline and observe how poisoned context changes retrieval and generation.

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AI Safety & Red Teaming

Agent Attack Chain Visualizer

Step-by-step visualization of multi-tool agentic exploits with toggleable defenses.

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Systems & Memory Safety

Visual explanations of low-level security concepts and failure modes.

Systems & Memory Safety

Memory Corruption Playground

Hands-on, in-browser simulation of buffer overflows, use-after-free, and double free.

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Systems & Memory Safety

Exploit Chain Visualizer

Step-by-step visualization of buffer overflow exploitation with defense mechanisms.

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Risk & Threat Modeling

Deterministic analysis for early security and architecture review.

Risk & Threat Modeling

Faultlines

Deterministic threat-model synthesis without machine learning.

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Risk & Threat Modeling

Alert Triage Simulator

Practice SOC alert triage under pressure. Learn to spot real threats in noise.

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Risk & Threat Modeling

Wazuh Rule Builder

Write and test Wazuh custom rules and decoders against sample log lines in the browser.

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Quantum Computing

Interactive visualizations for learning quantum mechanics and algorithms.

Quantum Computing

Bloch Sphere Playground

Interactive 3D visualization of qubit states and quantum gate operations.

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Quantum Computing

Quantum Circuit Builder

Drag-and-drop quantum circuit designer with state simulation and Qiskit export.

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Cryptography

Client-side cryptography demos and local-first tools.

Cryptography

Paste

Client-side encrypted paste links with keys stored in the URL fragment.

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Cryptography

Saf

Local file encryption bundles for secure sharing.

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Cryptography

Paillier homomorphic addition demo

Add numbers while encrypted to see private computation in action.

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Cryptography

Post-quantum cryptography

Post-quantum cryptography (PQC) demos and migration guidance.

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Explainers & Guides

Plain-language framing for how the tools work.

Explainers & Guides

Tools privacy

Security model that explains what the tools store and never collect.

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