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I built a real NTFS-level file locker in Python — no password needed to protect, and even I can't brute-force it

Most "file lock" apps on the market do one of two things: rename your file extension, or hide it in a folder. Both take about ten seconds to bypass with Windows Explorer's search bar.

  • ATLOCK v4.0 is Python-based file locker app for Windows
  • Manipulates NTFS ACL to block access, no password needed
  • Creator is 13-year-old developer, company aims for everyday software security

I Built Kafka From Scratch to Understand how it actually works

But Why?? I had used Kafka enough to know the terminology: topics, partitions, producers, consumers, replication. But knowing the pieces is different from understanding why they fit together the way…

  • Author builds Kafka-like message broker named kafka-lite from scratch
  • Development process broken into five stages focusing on log storage layer
  • Emphasizes importance of understanding storage layer implementation

An offline edit queue that can undo itself: rollback payloads, a lock, and the rule we had to delete

The app keeps a person's notes and lists on a server, and the server is the only source of truth. The phone holds a read-only mirror, refreshed on every successful fetch and served only when the…

  • Offline edit queue can undo itself when server denies changes
  • Rollback payloads trigger replay of edits without network connection
  • React Native 0.81 and Kotlin module implement the system

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