Nginx gives a feature for secure link protection (--with-http_secure_link_module configure option). I'd be nice to see this option in an ebuild.
Created attachment 191236 [details, diff] patch to enable NginxHttpSecureLinkModule
Created attachment 191238 [details, diff] patch to enable timestamp based creating hash This is an optional patch to enable timestamp based secure link creation. Briefly described here: http://www.ruscript.net/scripts/251/
No answer in two months. I'll fix this on my own this week.
Fixed in 0.8.4-r1.