Data in transit over the internet - Amazon IoT SiteWise
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Data in transit over the internet

Amazon IoT SiteWise uses Transport Layer Security (TLS) to encrypt all communication over the internet. All data sent to the Amazon Cloud is sent over a TLS connection using MQTT or HTTPS protocols, so it's secure by default. SiteWise Edge gateways, which run on Amazon IoT Greengrass, and property value notifications use the Amazon IoT transport security model. For more information, see Transport security in the Amazon IoT Developer Guide.