The OSCT is used to indicate the security options that can be accepted from a remote LU. To specify security parameters, use the SECURITY operand of the DEFOPSET command. The options for the operand are: NONE, USER, and USERPSWD.
If you specify NONE, the local system does not process any security information sent by the remote LU in an attach request. The remote LU can invoke unsecured transactions only.
If you specify USERPSWD, user IDs and passwords are accepted from the remote LU and passed to the local security system for verification. However, the already verified indicator is not accepted.
If you specify USER, then USERPSWD is assumed and in addition the already verified indicator is also supported. If the indicator is set, a request for user ID authorization is made to the local system to validate the region without a password.
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