You are a technician at a cloud security company called Cloud$-$Detect. Your research and development network are running several different services on the AWS cloud platform for a customer using both Infrastructure as a Service $($IaaS$)$ and Platform as a Service $($PaaS$).$ A customer is asking about the different types of encryption services available from Cloud$-$Detect. Describe, using examples, what are the differences between 'encryption in motion' and 'encryption at rest'.