This technical post walks through the design and implementation of Secure Playground: a local web app that simulates prompt-injection attacks against large language models and demonstrates simple defenses. Provide a minimal, reproducible environment to test payloads and defensive strategies. Make it easy to add new providers and run mutation-based red-team experiments. Offer a leaderboard and scor
What is Maven? => Maven automatically downloads required libraries from online repositories, so developers don’t need to manage JAR files manually. It follows a standard project structure, making projects easy to understand and maintain. => Maven also manages the build lifecycle, including compile, test, package, and deploy phases. Overall, Maven simplifies development by handling dependencies, b
Metasploitable2 - FTP Exploitation using vsftpd 2.3.4 Backdoor 1. Objective To identify and exploit a known vulnerability in an FTP service running on a vulnerable target machine using industry-standard reconnaissance and exploitation techniques. 2. Lab Environment Component Description Attacker Machine Kali Linux Target Machine Metasploitable2 Network Type Host-only / NAT
Introduction Wormhole4j is a Java implementation of the Wormhole index, an ordered in-memory data structure from the EuroSys '19 paper, "Wormhole: A Fast Ordered Index for In-memory Data." By using the strengths of hash tables, prefix trees, and B+ trees, it achieves a worst-case lookup complexity of O(log L), where L is the length of the key. This makes it very fast for both point lookups and r
This is Part 1 of a two-part series. Part 2 (coming soon): Connecting to spoke clusters from a controller using multicluster-runtime, driven by ClusterProfile. The Cluster Inventory API (multicluster.x-k8s.io) is driven by SIG-Multicluster and centered on the ClusterProfile resource. It only delivers value when something produces those ClusterProfiles. That something is a cluster manager. Today, t
At the beginning of this series, the problem seemed simple. There were a lot of rocks in the yard. Some were small. Some were large. A few were firmly in what I’ve been calling Engine Block Class. The original idea was straightforward: catalog them, maybe sell a few, and build a small system around the process. Along the way, the project grew. What We Built Across the previous posts, the Backyard
When developers travel, we usually prepare the obvious things. Laptop charger. But there is one dependency that is easy to underestimate until it breaks: mobile internet. A trip to China makes this especially obvious. Not because China is hard to travel in, but because so many basic interactions are mobile-first: navigation, translation, ride-hailing, hotel communication, ticket confirmations, pay
The Hidden Cost of Calling AI Too Early I stopped calling AI on every request — and everything got better. In one of my projects, I was generating AI-based insights from user activity. The initial design was simple: Every request for today’s insight → call the AI model → return a fresh response. GET /api/insights/today At first, this felt clean and correct. But in practice, it created serious