# How does Amazon know what device you've registered

**URL:** <https://boards.straightdope.com/t/how-does-amazon-know-what-device-youve-registered/631059>\
**Category:** Cafe Society\
**Created:** [August 10, 2012, 6:12am UTC](https://boards.straightdope.com/t/how-does-amazon-know-what-device-youve-registered/631059 "2012-08-10T06:12:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Postariti](https://avatars.discourse-cdn.com/v4/letter/p/b4bc9f/32.png) [@Postariti](https://boards.straightdope.com/u/Postariti)\
**Post date:** [August 10, 2012, 6:12am UTC](https://boards.straightdope.com/t/how-does-amazon-know-what-device-youve-registered/631059/1 "2012-08-10T06:12:36Z")

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…and other questions.

Does anyone here know the ins and outs of the new Amazon cloud system?

I share a computer with my parents, and I’m afraid this will cause problems. We’ve all bought MP3s and have them in our own cloud.

I “authorized” the computer today from my account. Does this mean the computer can only download from my cloud?

Also, does anyone know how they recognize the device? As far as I can tell it’s not through any kind of cookie. I found a discussion about google music that guessed they were storing the MAC address. Does anyone know if that’s what Amazon is doing?