Abstract
The remote configuration of intelligent electronic devices (IED) is an important safety, reliability related function in substation automation systems. With the issue of IEC 61850 standard, the Substation Configuration description Language (SCL) based on XML can be an effective solution for IED description and configuration. The realization of remote configuration must be established on the foundation of security communication channel, but conventional cyber-security technologies like IPSec, SSL are not enough for the protection of SCL files. This paper presents a security mechanism based on XML Security, defining an extended schema for SCL security, guaranteing the integrality and authentication of both communication ends through the signature for SCL files, protecting the SCL elements for multi-granularity confidentiality through the symmetrical key encryption. A SCLSec system with this security mechanism is designed for remote configuration. On the study of a remote configuration instance, the SCLSec system can meet the demands of security requirements and is suitable for the applications in substation automation system. The work is based on the standards of information security and power engineering. It is not conflicting with the progressing work of IEC TC57 WG15 and can provide useful supplement. (6 pages)
Published Version
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