I am looking for a way to have a customer:
1. signup on my website
2. Make Payment
3. Download and Install Application
-------------------
Note:
1. The person that signs up should only be able to download the Installation files once. (the link won't work if again)
This is my question:
What is the best way to implement the Note mentioned above. Does it require database? GUID? What are my options?
Advise!
thanks
## Deliverables
A good comprehensive answer to my question.
## Platform
ASP
ASP .NET
Downloading Files
Security