Efficient secure group communications for SCADA

Donghyun Choi, Sungjin Lee, Dongho Won, Seungjoo Kim

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


Modern industrial facilities have command and control systems. These industrial command and control systems are commonly called supervisory control and data acquisition (SCADA). In the past, SCADA system has the closed operating environment, so this system were designed without security functionality. These days, as a demand for connecting the SCADA system to the open network increases, the study of SCADA system security is an issue. A key-management scheme is essential for secure SCADA communications. Several key-management schemes for SCADA also have been proposed. Recently, advanced SCADA key-management architecture (ASKMA) was proposed. While previous studies do not support message broadcasting and secure communications, ASKMA supports it. Although the overall performance of ASKMA has many advantages compared to previous studies, it can be less efficient during multicast. In this paper, we propose ASKMA+ which is a more efficient scheme that decreases the computational cost for multicast communication. ASKMA+ reduces the number of keys to be stored in a remote terminal unit and provides multicast and broadcast communications.

Original languageEnglish
Article number5356212
Pages (from-to)714-722
Number of pages9
JournalIEEE Transactions on Power Delivery
Issue number2
Publication statusPublished - 2010 Apr
Externally publishedYes

Bibliographical note

Funding Information:
Manuscript received September 30, 2008; revised August 03, 2009. First published December 18, 2009; current version published March 24, 2010. This work was supported in part by the Ministry of Knowledge Economy, Korea, under the Information Technology Research Center (ITRC) support program supervised by the Institute of Information Technology Advancement (IITA-2009-(C1090-0902-0016)) and in part by the Defense Acquisition Program Administration and Agency for Defense Development under Contract UD-070054AD. Paper no. TPWRD-00753-2008.


  • Key management
  • Power system security
  • Supervisory-control-and-data- acquisition (SCADA) systems

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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