What is zcmk key?
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Answer # 1 #
The master key ZCMK (Zone Control Master Key) is used to encrypt ZCK (Zone Control Key) keys. Zone Master Key(ZMK) is just another Des key. ZCMK – zone control master keys (between HSMs). This key is a master KEK used to protect data passing through the HSM, usually other keys. Within the VISA environment this is known as a ZCMK. Zone Control Master Key (ZCMK) Acquirer/Issuer Working Key (A/IWK) PIN Encryption Key (PEK) The master key loaded into the HSM by the key officers and used to protect all other keys.
