High Security with Low Latency in Legacy SCADA
Message authentication with low latency is necessary to ensure secure operations in legacy industrial control networks such as those in the power grid. Previous authentication solutions that examine single messages incur noticeable latency. This paper describes Predictive YASIR, a bump-in-the-wire device that reduces the latency by considering broader patterns of messages. The device predicts the incoming plaintext based on previous observations; compresses, encrypts and authenticates data online; and pre-sends a portion of the ciphertext before receiving the entire plaintext. The performance of Predictive YASIR is evaluated using a simulation involving the Modbus/ASCII protocol. By considering broader message patterns and using predictive analysis, improvements in latency of 15.48 ± 0.35% are obtained.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
- The following copyright notice applies to all of the above items that appear in IEEE publications: "Personal use of this material is permitted. However, permission to reprint/publish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from IEEE."
- The following copyright notice applies to all of the above items that appear in ACM publications: "© ACM, effective the year of publication shown in the bibliographic information. This file is the author’s version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in the journal or proceedings indicated in the bibliographic data for each item."
- The following copyright notice applies to all of the above items that appear in IFAC publications: "Document is being reproduced under permission of the Copyright Holder. Use or reproduction of the Document is for informational or personal use only."
