Applied Systems Engineering ASE2000

ASE2000 V2 Communication Test Set User Manual 171
Once the key or keys are specied, from menu elds shown above, select which Active User to
use: (1) Master, (2) RTU, or (other) User.
26.5.5. DNP3 – Other Secure Authentication Properties
Other global parameters that impact ASE2000 Secure Authentication are:
Aggressive Mode, if checked, enables Aggressive Mode for applicable exchanges. Please refer
to the Secure Authentication specication for more information.
Session Key Interval denes the maximum time interval, in seconds, between session key
exchanges
Session Key Count denes the maximum number of application data messages protected by
Secure Authentication that can occur before a session key update
Maximum Error Count denes the maximum number of Secure Authentication errors that can
occur before a session key update (SAv2 only)
Session Key Size denes the key size. Use the default, 128, unless instructed otherwise by
your organization.
Key Change Method selects the mechanism used when key change is made (SAv5 only)
MAC Algorithm selects the SHA (Secure Hash Algorithm) or AES (Advanced Encryption
Standard) and number of octets (AES is only available for SAv5)
Key Wrap Algorithm selects the AES key wrap algorithm to use
Opt. Critical Functions The DNP Specication denes functions that must be protected by Secure
Authentication, such as Relay Controls, and functions that may optionally be protected. Those
optional functions are shown by a pull-down list that occurs after clicking in the Opt. Critical
Functions. Functions checked in this pull-down list are included in protection processing