title: IEC 62351
text: # IEC 62351
  
  IEC 62351 is a standard developed by WG15 of IEC TC57. This is developed for handling the security of TC 57 series of protocols including IEC 60870-5 series, IEC 60870-6 series, IEC 61850 series, IEC 61970 series & IEC 61968 series. The different security objectives include authentication of data transfer through digital signatures, ensuring only authenticated access, prevention of eavesdropping, prevention of playback and spoofing, and intrusion detection.
  
  ## Standard details
  
  * IEC 62351-1 — Introduction to the standard
  * IEC 62351-2 — Glossary of terms
  * IEC 62351-3 — Security for any profiles including TCP/IP.
     * TLS Encryption
     * Node Authentication by means of X.509 certificates
     * Message Authentication
  * IEC 62351-4 — Security for any profiles including MMS (e.g., ICCP-based IEC 60870-6, IEC 61850, etc.).
     * Authentication for MMS
     * TLS (RFC 2246)is inserted between RFC 1006 & RFC 793 to provide transport layer security
  * IEC 62351-5 — Security for any profiles including IEC 60870-5 (e.g., DNP3 derivative)
     * TLS for TCP/IP profiles and encryption for serial profiles.
  * IEC 62351-6 — Security for IEC 61850 profiles.
     * VLAN use is made as mandatory for GOOSE
     * RFC 2030 to be used for SNTP
  * IEC 62351-7 — Security through network and system management.
     * Defines Management Information Base (MIBs) that are specific for the power industry, to handle network and system management through SNMP based methods.
  * IEC 62351-8 — Role-based access control.
     * Covers the access control of users and automated agents to data objects in power systems by means of role-based access control (RBAC).
  * IEC 62351-9 — Key Management
     * Describes the correct and safe usage of safety-critical parameters, e.g. passwords, encryption keys.
     * Covers the whole life cycle of cryptographic information (enrollment, creation, distribution, installation, usage, storage and removal).
     * Methods for algorithms using asymmetric cryptography
        * Handling of digital certificates (public / private key)
        * Setup of the PKI environment with X.509 certificates
        * Certificate enrollment by means of SCEP / CMP / EST
        * Certificate revocation by means of CRL / OCSP
     * A secure distribution mechanism based on GDOI and the IKEv2 protocol is presented for the usage of symmetric keys, e.g. session keys.
  * IEC 62351-10 — Security Architecture
     * Explanation of security architectures for the entire IT infrastructure
     * Identifying critical points of the communication architecture, e.g. substation control center, substation automation
     * Appropriate mechanisms security requirements, e.g. data encryption, user authentication
     * Applicability of well-proven standards from the IT domain, e.g. VPN tunnel, secure FTP, HTTPS
  * IEC 62351-11 — Security for XML Files
     * Embedding of the original XML content into an XML container
     * Date of issue and access control for XML data
     * X.509 signature for authenticity of XML data
     * Optional data encryption
  