System and method for security authentication of power system

• US 9,054,878 B2
• Filed: 09/27/2013
• Issued: 06/09/2015
• Est. Priority Date: 11/28/2012
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: Choi, Won Seok, Park, Jong Ho, Shin, Yong Hark
• Primary Examiner(s): Truong, Thanhnga B
• Application Number:
  US14/039,593
• Publication Number:
  US 20140149736A1
• Time in Patent Office: 620 Days
• Field of Search: 713/156, 713/158, 705/1.1
• US Class Current: 1/1
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/0823 using certificates cryptographic mechanisms or cryptographic arrangements for entity authentication involving certificates H04L9/3263
• CPC Class Codes: H04L 9/0825 using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
• CPC Class Codes: H04L 9/3263 involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network H04L63/0823

Abstract

A method for security authentication of a power system includes transmitting, by at least one power system, a signal for requesting performing authentication on at least one remote control server or an external terminal with which the power system is to perform communication, to an authentication server, receiving, by the power system, an authentication certificate generated by the authentication server, and perform authentication on the remote control server or the external terminal by using the authentication certificate, and when authentication is completed by the authentication server, performing communication, by the power system, with the authentication-completed remote control server or the external terminal through an open-type communication network.

Claims

1. A method for security authentication by a power system, the method comprising:

transmitting a signal to an authentication server to request authentication on at least one remote control server or an external terminal with which the power system is to perform communication;

transmitting a public key to the authentication server;

receiving an authentication certificate transmitted by the authentication server, the authentication certificate generated by the authentication server using the transmitted public key;

performing authentication on the at least one remote control server or the external terminal using the received authentication certificate; and

performing communication with the authenticated at least one remote control server or the external terminal through an open-type communication network when authentication is completed by the authentication server;

wherein performing authentication comprises;

receiving a remote control server public key from the at least one remote control server;

encrypting a symmetric key using the received remote control server public key; and

transmitting the encrypted symmetric key to the at least one remote control server.

2. The method of claim 1, further comprising:

encrypting data desired to be transmitted using the symmetric key; and

transmitting the encrypted data to the at least one remote control server for decryption by the at least one remote control server using the symmetric key, wherein the symmetric key is decrypted from the transmitted encrypted symmetric key by the at least one remote control server.