Plugin for easy file transfers

Would you folks know of a semi-secure Grav plugin/Grav-friendly library for publicly uploading and retrieving files? For example:

1. User drags and drops a file on to page
2. File is uploaded to my server
3. Unique access code generated for user
4. User is able to retrieve file with generated access code
   i. The system is secure from malicious access (not including DDoS or unfair use which can't be helped)

Cheers!

I'm not aware of a Grav plugin but you might want to have a go at using the jQuery File Upload Plugin.

I did see that actually! Good to see a recommendation of it before I dive in.