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Adapting the Pretty Good Privacy Security Style to Power System Distributed Network Protocol

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4 Author(s)

Power system modernization with increasing operation automation and integration results in growing computer network access. This facilitates cyber-attackers' capabilities to assume control over power system operations that could cause serious blackouts. Security therefore becomes a critical issue for DNP3, a commonly used protocol for power system communications. This paper proposes cyber-security based on Pretty Good Privacy (PGP) for DNP3 to strengthen computer network security. This PGP-based cyber-security provides authentication capabilities using public key cryptography, with enhanced performance using symmetric keys for most of the encryption. This paper provides a symmetric cipher key exchange mechanism using PGP-based cyber-security to further enhance the power system security. The proposed PGP-based cyber-security is implemented as a pseudo-layer below the DNP3 data-link layer to minimize any impact on the DNP3 specifications and the operations of original DNP3 devices. This PGP-based cyber-security provides confidentiality, identity authentication, transmission content authentication, and nonrepudiation

Published in:

Power Engineering, 2006 Large Engineering Systems Conference on

Date of Conference:

26-28 July 2006