Is it possible the return of key? | URI - Audio/video stream recording forums

Hi! And Thanks for this space. One question!

Code:

#EXTM3U

#EXT-X-VERSION:2

## Created with Unified Streaming Platform(version=1.7.25)

#EXT-X-MEDIA-SEQUENCE:1

#EXT-X-TARGETDURATION:10

#USP-X-TIMESTAMP-MAP:MPEGTS=900000,LOCAL=1970-01-01T00:00:00Z

#EXTINF:10, no desc

#EXT-X-KEY:METHOD=AES-128,URI="http://something.e$s$d$c.something/g$e$t$k$e$y",IV=0x00000000000000000000000000000000

I understand that it is necessary to send "something" to the url for the return of the key.

If so, what should I send and how to obtain it?
If not, how can i interpret that?

Thanks for the help.