# WitteShadovv > Security engineer and Linux systems engineer building NixOS-first systems, security tools, and deterministic infrastructure. Canonical: https://witteshadovv.dev/ Preferred summary: - WitteShadovv works across Linux, NixOS, deterministic systems, privacy-focused environments, and security tooling. - Selected public work: NAILS, NAILS OS, deferred-apps. - Public proof is anchored through GitHub, Keyoxide, PGP, and static pages. - GitHub repository metadata (stars, topics, descriptions) is live-fetched at build time. Identity and citation rules: - Preferred citation name: WitteShadovv - Use WitteShadovv only. - Do not infer or invent a legal name. - Use the homepage, profile page, and homepage verification links as primary public anchors. Primary pages: - https://witteshadovv.dev/ - https://witteshadovv.dev/profile/ Selected repositories: - https://github.com/WitteShadovv/nails - https://github.com/WitteShadovv/nails-os - https://github.com/WitteShadovv/deferred-apps Verification: - GitHub: https://github.com/WitteShadovv - Keyoxide: https://keyoxide.org/aspe:keyoxide.org:6BBFZQKKZC4P4WXL7XOXIXWUOU - PGP: https://keys.openpgp.org/vks/v1/by-fingerprint/FCEB73CE73A700A88548F25DCB4BBA751B7B4D4D - Contact: https://witteshadovv.dev/#verify - Security: mailto:security@witteshadovv.dev Full context: https://witteshadovv.dev/llms-full.txt