All customer data and metadata is stored in AWS (Amazon Web Services) in the US-East-1 DC data center in Virginia. Envoy never stores customer data on local devices or any other internal network. Envoy does not store data locally, with the exception of Offline mode. When the iPad is in offline mode, we use NSKeyedArchiver to encode the visitor's information and then save the data by using NSUserDefaults. We store the employee list, in a similar fashion. The names are cached and stored encrypted. Once the iPad reconnects to the Internet all the data is removed from the device and then stored in AWS.

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