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.
SPI flash write protection locks firmware with chip bits, a WP# pin, chipset locks and a root of trust. Learn how each layer works and how to check yours.
OpenSBI is the reference M-mode firmware that gives RISC-V kernels timers, IPIs and hart control via the SBI. Learn the boot chain and how to verify it.
Linux Mint runs from 1.0 Ada (2006) to 22.3 Zena (2026), with 27 Adrien next. Here is every Ubuntu base, LMDE release and support end date for each.
NetBSD 11.0 (30 July 2026) is its 19th major release. Every version date, the two branch support rule, pkgsrc quarterly branches and how to patch.
IS-IS is a link-state IGP that runs over layer 2. How NETs, LSPs, levels and TLVs work, how HMAC authentication protects it, and a FRRouting lab.
mDNS resolves .local names by multicast on UDP 5353 and DNS-SD finds services with PTR, SRV and TXT records. How both work and how to secure them.
GRE and IP-in-IP wrap one IP packet inside another with no encryption. How the headers work, why MTU breaks, and how to lock tunnels down with IPsec.
An IP camera is a lens and image sensor feeding a vision SoC that runs embedded Linux, encodes H.264 or H.265 and streams via RTSP, ONVIF or a cloud relay.
A smart lock is a geared motor on a rated deadbolt, run by a low power radio chip with a secure element. How it is built, paired, updated and regulated.
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