Method of authenticating device using broadcast cryptography

• Main Authors: KIM CHI-HURN, YOU YONG-KUK
• Format: Patent
• Language: English
• Published: 06.04.2006
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A method of authenticating a device having its own device key allocated by an authentication server according to broadcast cryptography is disclosed. The method includes receiving a device identifier of the device and an encrypted device identifier generated by encrypting the device identifier with the device key; and examining whether or not the device identifier is identical to a decrypted device identifier generated by decrypting the encrypted device identifier with another device key corresponding to the device identifier. Therefore, it is possible to authenticate a device having its own device key allocated by an authentication server according to broadcast cryptography without using a separate public key structure.