Can HLS AES encryption be used for RTMP Live Pulled streams for edge servers?

HLS AES encryption can be used for HLS only, certainly it not applicable to RTMP; probably you mean RTMPS/RTMPE? Unfortunately, nimble doesn't support it.
If you need to encrypt traffic between origin and edge servers, we would recommend to use SRT protocol with encryption ( passphrase / pbkeylen parameters). Refer to this page for SRT support in Nimble: https://wmspanel.com/nimble/srt

If you just mean you want to perform AES encryption for your output HLS streams - origin of streams doesn't matter, so it can be applied to streams pulled by RTMP like any other stream. You can read about HLS AES encryption support here: https://blog.wmspanel.com/2015/02/hls-aes-encryption-drm-support-nimble-streamer.html

Thank you. The second answer was what I wanted. I just want to perform AES Encryption for my output HLS streams. Do I perform the steps on my edge nimble servers?

Yes, it should be set up on edge servers.

Hello,
I am following step 1. from https://blog.wmspanel.com/2015/02/hls-aes-encryption-drm-support-nimble-streamer.html url for using encryption key hosted by Nimble, is there any other configuration that I need to perform?

I am getting "GET /test/test.stream/hls.key?nimblesessionid=230 HTTP/1.1" on my nimble access log when a stream is requested but the playlist.m3u8 has only the following parameters

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=2317671,RESOLUTION=1920x1072,CODECS="avc1.42c028,mp4a.40.2"
chunks.m3u8?nimblesessionid=2

How do I get the aes key format? I have created an application and pulled a RTMP stream.

Hello,

Master playlist does not contain a reference to hls.key, but chunklist does (check the content of chunks.m3u8). HLS AES key is just 16 bytes used as an encryption key.

Hi,

Thank you your explanation. I am a bit new to streaming and have only been recently testing nimble. I have the following data in the chunks.m2u8:

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:11
#EXT-X-MEDIA-SEQUENCE:2248
#EXT-X-KEY:METHOD=AES-128,URI="hls.key?nimblesessionid=4"
#EXTINF:10.01,
l_934_22481738_2248.ts?nimblesessionid=4
#EXTINF:10.01,
l_934_22491748_2249.ts?nimblesessionid=4
#EXTINF:10.01,
l_934_22501758_2250.ts?nimblesessionid=4
#EXTINF:9.977,
l_934_22511768_2251.ts?nimblesessionid=4

Does this mean my stream is aes encrypted?

Yes, HLS AES encryption is applied to that stream. If you download a chunk from this chunklist (e.g. l_934_22481738_2248.ts) it will not be played without decryption (try to play downloaded chunk file with e.g. VLC).