Secure session
The phone and gateway exchange temporary keys for UWB ranging over an authenticated Bluetooth connection.
High Assurance
Measure proximity securely and require user approval for every transaction.
High Assurance combines secure UWB distance measurement with phone user verification in the same attempt.
UWBSecure ranging
STSProtected session
1:1Attempt-bound approval
ØDenied when a required check is missing
Distance verification
The distance measurement is valid only for the relevant transaction and gateway.
The UWB measurement is cryptographically matched to the phone identity, attempt, gateway, and entry point. The server produces a High Assurance decision only with an accepted distance measurement and current calibration rules.
Distance rules
Accepted distance, direction of approach, dwell time, and adjacent-door behavior are defined separately for each entry point.
Field testing
Each model and version is tested without direct line of sight and against relay, distance-reduction, and false-acceptance attempts.
User approval
The user approves the transaction without biometric data ever reaching MesaiGo.
The iOS or Android local authentication screen permits use of the transaction key. MesaiGo receives no face, fingerprint, or biometric template; it verifies only that the signing operation was approved on-device.
Every attempt
There is no cached approval or grace period that unlocks multiple attempts.
Stays on-device
PIN and biometric data stay inside iOS or Android and are never sent to MesaiGo.
Denied when a required check is missing
If the required UWB measurement or user approval is unavailable, the transaction is denied instead of falling back to Standard.
Define verification rules for your critical space.
Let us evaluate distance, user approval, two-person rules, and the physical passage result together.