Recent Posts

Compare Java and C++ through builds, object lifetime, safety, performance, and tools, then try a small project in both languages.

Learn to scope a threat model, map trust boundaries, write specific threat statements, and turn concerns into checks in an owned app or authorized lab.

Learn a practical approach to secure code review: trace caller-controlled data, verify authorization, inspect failure paths, and test access boundaries safely.

Harden a Linux host by checking services, updates, accounts, SSH, firewall rules, permissions, backups, and logs—then verify that the workload still works.

Learn how to set input contracts in C++, bound raw data, parse complete values, check arithmetic and text rules, and test malformed input.

Learn how to define failure contracts in Java, preserve exception causes, close resources, log safely, limit retries, and test error paths.

Learn to diagnose lab connection failures with built-in network commands, curl, packet captures, Nmap, firewalls, and logs—within an authorized scope.

Build branch-specific Java fixtures for browser-game signup tests, check validation and provider responses, and prevent test inputs from reaching live services.

Learn how Linux file and directory permissions work, use chmod and umask, and diagnose Permission denied errors without opening access unnecessarily.

Learn what TLS protects, how certificates verify a server, where HTTPS coverage ends, and how to diagnose connection errors without disabling verification.