Manas — Field Noteshttps://manasraj.vercel.app/archive.htmlSecurity research, engineering and systems notes by Manas.enInfrastructure Patterns and Recon: How Systems Betray Themselveshttps://manasraj.vercel.app/articles/thinking-like-infrastructure.htmlhttps://manasraj.vercel.app/articles/thinking-like-infrastructure.htmlA technical method for turning DNS, certificate logs, code, and client-side clues into testable infrastructure hypotheses without confusing correlation with ownership.Wed, 11 Feb 2026 12:00:00 GMTAntenna Theory and Wave Propagation: Fundamentals for Security Researchershttps://manasraj.vercel.app/articles/antenna-wave-propagation.htmlhttps://manasraj.vercel.app/articles/antenna-wave-propagation.htmlA practical derivation of wavelength, antenna gain, path loss, noise, multipath, and what a radio link budget can actually tell a security researcher.Wed, 05 Jun 2024 12:00:00 GMTThe Zero-Sum Silicon Game: Analyzing US Tech Dominance via the PPF Modelhttps://manasraj.vercel.app/articles/PPF-model.htmlhttps://manasraj.vercel.app/articles/PPF-model.htmlA production-possibilities model for semiconductor design, fabrication, packaging, and the bottlenecks that make simple zero-sum stories misleading.Sat, 01 Jun 2024 12:00:00 GMTCron Jobs and Privilege Escalation: Mechanics and Mitigationhttps://manasraj.vercel.app/articles/cron_jobs_to_priviliage_esc.htmlhttps://manasraj.vercel.app/articles/cron_jobs_to_priviliage_esc.htmlA close look at cron's privilege boundary: path resolution, file ownership, shell behavior, race conditions, safe auditing, and how to design jobs that do not inherit writable code.Thu, 09 May 2024 12:00:00 GMT