IEC TS 62351-5:2013

IEC/TS 62351-5:2013(E) specifies messages, procedures and algorithms for securing the operation of all protocols based on or derived from IEC 60870-5: Telecontrol equipment and systems - Transmission protocols. This Technical Specification applies to at least those protocols listed in IEC 60870-5-101, 5-102, 5-103, 5-104. This new edition includes the following main changes with respect to the previous edition: - adds the capability to change Update Keys remotely; - adds security statistics to aid in detecting attacks; - adds measures to avoid being forced to change session keys too often; - discards unexpected messages more often as possible attacks; - adds to the list of permitted security algorithms; - adds new rules for calculating challenge sequence numbers.