ENCR

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   .-ENCR--=--NONE-----.   
>>-+-------------------+---------------------------------------><
   |          .-NONE-. |   
   '-ENCR--=--+------+-'   
              +-OPT--+     
              +-REQD-+     
              '-SEL--'     

Specifies whether this logical unit has any special requirements for enciphering and deciphering messages.
ENCR=NONE
Specifies that this logical unit cannot engage in cryptographic sessions.
ENCR=OPT
Specifies that this logical unit can engage in cryptographic sessions, but allows the application program to determine whether to use cryptography.
ENCR=REQD
Specifies that VTAM must encipher all messages to and from this logical unit. If you code ENCR=REQD, no session can be established with this logical unit unless the host with which it is associated can handle cryptographic sessions.
ENCR=SEL
Has no meaning for logical units. If you code ENCR=SEL, ENCR=OPT is used instead.