julian
9e442586af
New concept page backup-recovery.md resolving the design half of open-question #5. Driving scenario: a stolen/destroyed PC whose LUKS+TPM disk is unrecoverable by design — recovery stands up a NEW PC, restores a backup, and keeps signing the SAME chain. Settled: admin-driven encrypted full-DB backup (SQLite online-backup/VACUUM INTO, snapshots included) to local/USB, SMB/NFS, or SFTP targets; manual button + an in-process daily timer; keep-last-N + dailies retention; restore is admin-only / out-of-band (operator-adversary surface). A restored copy must still verifyChain. Key custody (the load-bearing decision, bears on #6): three independent keys — EVENT_SIGNING_KEY kept an extractable, escrowed software key DECOUPLED from the TPM so the ledger survives total hardware loss (the conscious trade: a TPM-sealed signing key would be unforgeable but permanently unverifiable after the machine dies); a NEW dedicated park_buzi_backup_key in Komodo for backup encryption, separate from the signing key; the LUKS/TPM disk key, appliance-only and deliberately non-recoverable. Keys are never inside the backup they unlock. Updated open-questions #5 (design SETTLED) + #10 note; disk-os-hardening deploy runbook (why the signing key is not sealed + park_buzi_backup_key); index catalog + concept count. Design only — not yet built. Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V