S3 plugin pre-sales question

Hi,

I just have a quick question regarding your premium plugin (it is odd that I can’t ask a pre sales question on your website?): http://getshopped.org/premium-upgrades/premium-plugin/amazon-s3-integration-wordpress/

I am just wondering if the file permissions in S3 are set to Open/Download for Everyone, does the cart generate encrypted and expiring download links? i.e. does not send the direct link to the file on Amazon?

Many thanks.

https://ww.wp.xz.cn/plugins/wp-e-commerce/