Leashing is a Safetrust technology embedded in our door readers. The technology securely monitors for the presence of a mobile device with the Safetrust Wallet enabled and then wakes up the application in the background of the phone to authenticate with a valid credential in the wallet. This is technically achieved by making our supported readers act as a “central” device and the phone as a “peripheral”. The peripheral responds to the central when the central scans for it. Otherwise the wallet application is asleep.