icm/trace_secured_data is a SAP Parameter attribute which is used to control Show encrypted data in ICM tracefile dev_icm information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter specifies whether SSL can be used to output encrypted
data to the trace file in the ICM (dev_icm) or SAP Web Dispatcher
(dev_webdisp).
For security reasons the default value of this parameter is FALSE. In
this case the following text is displayed in the trace file:
BINDUMP of content denied
See SAP Parameter Documentation for full SAP documentation for this profile parameter.