Supply Chain Security
In-depth guides and analysis on supply chain security from the Safeguard engineering team.
100 articles
eSIM and eUICC Explained: SGP.22, SGP.32, SM-DP+ and iSIM
How eSIM works: the eUICC chip, SGP.22 consumer and SGP.32 IoT remote SIM provisioning, SM-DP+, activation codes, eIM, iSIM, certification and SIM swap.
LwM2M Explained: Object Model, Bootstrap, DTLS, OSCORE and Firmware
LwM2M is the OMA SpecWorks IoT device management protocol on CoAP. How objects, bootstrap, DTLS, OSCORE and firmware updates work, and how to secure them.
SOME/IP, DoIP and Automotive Ethernet Explained: 100BASE-T1 to SecOC
Automotive Ethernet runs SOME/IP services and DoIP diagnostics over single pair links. How each works, how SecOC, MACsec and TLS secure them, and what to check.
I2C, SMBus, PMBus and I3C Explained: BMC Sideband and Firmware Security
I2C, SMBus, PMBus and I3C link sensors, memory, power and BMCs on a board. None authenticate devices, so security comes from isolation and attestation.
Amadeus Data Exposures: Korean Air, Asiana, Lufthansa and Condor
Two separate Amadeus exposures reached Korean Air, Asiana, Lufthansa and Condor passengers. What each source says, what is unknown, and what to do now.
Gheist: Stolen GitHub Tokens and the sync-check Secret Dump
Gheist pushes a sync-check workflow with stolen GitHub tokens to dump CI secrets into Actions logs. Who is exposed, the IOCs and what to rotate today.
How an ATM Is Made: Safe, Dispenser, PC Core, XFS and PIN Pad
An ATM is a rated safe and cash dispenser run by a Windows PC through XFS middleware, with a PCI approved PIN pad. How it is built, keyed and kept patched.
Rust Release History: 1.0 to the 2024 Edition, Trains and Security
Rust ships a stable release every six weeks, has no LTS, uses editions for opt-in breaking changes and patches only the newest stable. The full history.
HAProxy Release History: LTS Branches, SSL, HTTP/2 and HTTP/3
HAProxy ships two branches a year: even LTS lines kept 5 years, odd stable lines kept 12 to 18 months. Versions, SSL, HTTP/2, HTTP/3 and security features.
Apache Tomcat Release History: 3.x to 11, Jakarta and Support Dates
Tomcat began as Sun's servlet reference code, given to Apache in 1999. Today 11.0, 10.1 and 9.0 are supported; 9.0 support ends 31 March 2027.
systemd Release History: Versions, Sandboxing and Security by Release
systemd grew from a 2010 init experiment to v262 in 2026. See which version added each component, sandboxing directive and security feature.
MySQL and MariaDB Release History: 3.23 to LTS, the Fork and Security
MySQL ran from 3.23 to 8.4 and 9.7 LTS plus calendar versioned Innovation releases; MariaDB forked in 2009. Dates, auth and TLS changes, side by side.
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