Deep dives, practical guides, and incident analyses from engineers who build Safeguard. No fluff, no vendor FUD — just what you need to ship secure software.
sFlow samples 1 in N packet headers and polls interface counters, sending both over UDP 6343. How it works, its accuracy and how it differs from IPFIX.
L2TP carries PPP or any layer 2 frame across IP with no encryption. How the control channel, cookies and pseudowires work, and how to lock L2TP down.
Slackware 1.00 shipped in July 1993; 15.0 came on 2 February 2022 and still gets patches. Release history, pkgtools, GPG checks and security fixes.
AL1 ended 31 Dec 2023, AL2 on 30 June 2026, and AL2023 runs to 30 June 2029. Every version, the repository models, ALAS advisories and how to migrate.
GrapheneOS is a hardened Android build for Pixels. Every major release from Android 10 to 17, supported devices, hardening features and how updates work.
Radioactive decay is random per atom but exponential in bulk. N(t) = N0 e^(-λt), half-life, becquerels, and carbon-14, Am-241 and Tc-99m worked examples.
Photos carry EXIF, GPS, XMP, IPTC and sometimes signed Content Credentials. What each holds, who keeps it on upload, and how to strip location safely.
How ALPR cameras read plates, what each read stores, who keeps and shares the data, and what state laws, audits and courts say about plate reader privacy.
The Arrhenius equation links reaction rate to temperature. Each term, its history, and worked examples from fridge shelf life to battery and chip ageing.
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