Certificate Samsung

Please if somebody know some information of Certificate IMEI for samsung.
1. The certificate purpose for whats ?
Lets take look certificate sample
;Samsung CERT file
;Please do not edit this file
[cert]
Model=SM-G900F
IMEI=352558067456419
SerNo=00000000000
ImeiSign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
PubKey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
PubKeySign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

seems the format of certificate using digitalsign for imei & pubkey.

2. where the certificate will be store on samsung phone ?

is there have reference link or somethings, please where it is.