Seoul-built curriculum
Devnode Core
A calm operating system for Offline Wallet Device Register work — serials, firmware stamps, witness sheets, and recovery rehearsals that survive staff turnover.
Featured programs
Short, instrumented lessons that treat the Offline Wallet Device Register as a living artifact — not a spreadsheet you forget until an incident.
Offline Register Lab
Build a register that maps device IDs, witness roles, and sealed recovery media without exposing seed material online.
Firmware Change Log Clinic
Practice documenting upgrades, failed flashes, and rollback decisions so auditors can reconstruct a week of bench work.
Witness Sheet Design
Draft dual-control checklists that stay usable when gloves, cameras, and time pressure enter the room.
What teams take away
We focus on register hygiene — the paperwork and rituals that keep cold storage boring in the best way.
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Serial-first intake
Capture manufacturer IDs, seal photos, and intake timestamps before any pairing ceremony begins.
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Air-gap friendly templates
Printable sheets and offline CSV patterns that never require cloud sync to remain authoritative.
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Recovery without panic
Rehearse lost-device scenarios with redacted register excerpts so new staff inherit context, not folklore.
Voices from recent cohorts
Comments reference modules inside our Offline Register Lab — not generic praise.
The Module 3 witness sheet forced us to stop writing “ops team” as a role. We now list initials and badge IDs, which made our last internal audit quieter than expected.
Useful structure, though the firmware clinic still assumes you have a dedicated camera for seal photos — we had to improvise with phones and that slowed the drill.
Map your next device intake before the next shipment arrives
Start with the Offline Register Lab or ask us how Jung-gu cohorts run dual-control ceremonies.