Kicksecure is a security-hardened Debian-based Linux distribution that applies a broad set of kernel and userspace hardening settings out of the box, reducing the attack surface without requiring manual configuration. It also serves as the foundation for the Whonix anonymity OS.
Reviewed by Gabriel Bachmann
Kicksecure
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Threat level
Hardened
A hardened pick. Worth the effort once you have chosen to shrink your footprint on purpose. Enough for most people. Threat levels
Our take
Where most distros leave hardening as optional reading in a wiki, Kicksecure ships it switched on by default: TCP ISN randomization, kernel lockdown parameters, strong umask, and a suite of security-misc settings drawn from years of Whonix development. Debian as a base means broad hardware and software compatibility. The trade-off is that Kicksecure is not immutable, so a compromised package or a root-level exploit can still alter the running system in ways that Fedora Atomic or secureblue resist. Best suited to users who want a hardened general-purpose desktop on familiar Debian ground, or who want to understand the Whonix/Kicksecure ecosystem before running the full anonymity stack.
GitHub at a glance
Kicksecure/security-misc
Stars
586
+ 3 this week
Last commit
1mo ago
healthy
Stars, last 30d
Website at a glance
kicksecure.com
B+ score 80
Solid website security headers
Graded by Mozilla HTTP Observatory, tested 13d ago
Inspect this site yourself
Measures the security configuration of the tool's own website, not the privacy of the product itself. A strong tool can still score low here.
Kicksecure alternatives
Fedora Workstation Fedora Workstation: User friendly and easy to setup
Ubuntu Ubuntu: User friendly and easy to setup
macOS Apple's desktop OS. A real privacy step up from Windows, but closed and US-based.
secureblue secureblue is a security-hardened immutable Linux OS built on Fedora Atomic Desktops. It ships as OCI bootable container images and applies kernel hardening, a hardened memory allocator from GrapheneOS, and a hardened Chromium browser called Trivalent.
Fedora Atomic Desktops Fedora Atomic Desktops (Silverblue, Kinoite, and others) are immutable Fedora variants where the base OS is read-only and updated atomically via rpm-ostree. Applications run as Flatpaks, and rollback to a prior OS image is built in.
NixOS NixOS is a Linux distribution built entirely on the Nix package manager, where the whole system (kernel, packages, services, and configuration) is declared in a single set of files. Upgrades are atomic and fully reproducible rollbacks are a built-in feature.
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