what is a kgs map? and where can I read about it?

[GarrettSkj]

-- In the ASR1k IOS-XE 16.9 there is the following helps when I ? while defining a crypto map, I'm unfamiliar with the term CKM or KGS.

that_asr1k_router(config)#crypto map ABC 10 ?
  ckm           configure kgs map
  gdoi          configure GDOI map
  ipsec-isakmp  IPSEC w/ISAKMP
  ipsec-manual  IPSEC w/manual keying
  <cr>          <cr>

I can't find any documentation on this command, and what it does. I also notice that the command has been removed in 17.x. I'm not sure if its there in 16.12. Does anyone know what this does and/or can they provide any documentation on it? (Even if legacy?)

[MHM Cisco World]

https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/Aug2014/CVD-GETVPNDesignGuide-AUG14.pdf

[GarrettSkj]

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@MHM Cisco World wrote:

https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/Aug2014/CVD-GETVPNDesignGuide-AUG14.pdf

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that entire PDF doesn't have the term "ckm" or "kgs" in it... lol