Tactical digital defense for privacy-minded people operating in an increasingly hostile world.
A practical guide to OPSEC, threat modeling, Linux hardening, device security, anonymity workflows, and real-world resilience against surveillance and data exposure.
DSFM is built like a working field manual: practical, direct, and focused on decisions people actually have to make when privacy, identity, systems, and personal safety are on the line.
The second edition expands the manual with deeper workflows, updated hardening guidance, and operational security practices for real-world use.
Build safer habits around identity, metadata, compartmentalization, communications, and everyday digital exposure.
Apply practical hardening steps for systems, endpoints, permissions, services, networking, and privacy-focused operations.
Think clearly about adversaries, capabilities, exposure, risk, and the practical tradeoffs behind every defensive choice.
Designed for readers who need usable guidance, not abstract security slogans.