Apps built with MobileTogether include the ability to use SSL encryption between the mobile app and the back-end server, and with it come restrictions on importing and exporting the app in the United States and potentially other countries. If you intend to submit the AppStore App to Apple’s App Store or Microsoft’s App Store (and potentially others), their submission processes will ask whether the app includes encryption. Since all AppStore Apps built with MobileTogether include the ability to use the OS-provided libraries for SSL use in mobile apps and in particular for the encryption of the communication between the mobile app and server using the https protocol, the answer to this question is “YES.” At some point in the process, this answer will then trigger a prompt to upload your Encryption Registration Number (ERN). So how does one obtain an ERN?

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