Learning level
100/100
Storage & Sync Security
VauSheet · 81–100 · Advanced Architecture & SupportProduct version
1.0.1
Guide status
Advanced
Sections
4
Storage & Sync Security
Implementation-backedUnderstand owner-scoped workbook access and why synchronization control fields are server-managed.
What this guide covers
Authenticated ownership
Server-managed sync fields
Object storage access
User practice
Quick facts
Version1.0.1
SurfaceWeb browser
StorageCloud + local checkpoint
ThemeLight · white/orange
Documentation rule: this VauSheet section describes the current implemented product behavior. It avoids claiming full Microsoft Excel parity or live-cursor collaboration where the current build does not provide it.
01
Authenticated ownership
Workbook metadata access is tied to the authenticated user and owner-scoped backend rules. A workbook id alone is not intended to grant access.
02
Server-managed sync fields
Version, synchronization lock and related control state are protected from ordinary browser-side forgery. The client requests synchronization; server-side logic owns the authoritative control transition.
03
Object storage access
Workbook storage routes validate the authenticated request and workbook context before reading or writing the workbook object.
04
User practice
Protect the VauPrime account, avoid sharing exported workbook JSON publicly, and sign out on untrusted devices.
Updated 2 Sep 2026VauSheet 1.0.1