With updates to its “Snowball” device, Amazon Web Services looks to address concerns about how security works at the edge. The company added a layer of security to a device that could travel across the country or around the world. The rules of cloud security still apply: The service provider takes responsibility for the integrity of the infrastructure, while the customer ultimately is responsible for the data sent to the cloud. At the heart is cryptography, which helps secure the Snowball devices, and comes in handy for AWS customers.”]