Perhaps there should be a warning to you that when there's a new technology out there in existence, there's a chance that security will be added in the future. I don't know how much years it will take for security to exist in such new technology like Internet of Things. We might have already found some cloud storage services that have the encryption but what about the IOT devices?
Amazon introduces two new Alexa-powered devices such as Echo Dot and Amazon Tap. Like Amazon Echo, they are Alexa-powered and they offer the same function as Cortana, Siri, Google Now, etc.
For Echo Dot, you will need the speaker that can be connected through bluetooth or wired connection to act as the Amazon Echo. And for Amazon Tap, it has the push-to-talk functionality which is similar to the way you can press the microphone button on Amazon Fire TV Voice Remote.