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Quorum-based Key Management Scheme in Wireless Sensor Networks
( Lih-chyau Wuu ),( Chi-hsiang Hung ),( Chia-ming Chang ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.9
To ensure the security of wireless sensor networks, it is important to have a robust key management scheme. In this paper, we propose a Quorum-based key management scheme. A specific sensor, called as key distribution server (KDS), generates a key matrix and establishes a quorum system from the key matrix. The quorum system is a set system of subsets that the intersection of any two subsets is non-empty. In our scheme, each sensor is assigned a subset of the quorum system as its pre-distributed keys. Whenever any two sensors need a shared key, they exchange their IDs, and then each sensor by itself finds a common key from its assigned subset. A shared key is then generated by the two sensors individually based on the common key. By our scheme, no key is needed to be refreshed as a sensor leaves the network. Upon a sensor joining the network, the KDS broadcasts a message containing the joining sensor ID. After receiving the broadcast message, each sensor updates the key which is in common with the new joining one. Only XOR and hash operations are required to be executed during key update process, and each sensor needs to update one key only. Furthermore, if multiple sensors would like to have a secure group communication, the KDS broadcasts a message containing the partial information of a group key, and then each sensor in the group by itself is able to restore the group key by using the secret sharing technique without cooperating with other sensors in the group.
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Group Key Management based on (2, 2) Secret Sharing
( Lih-chyau Wuu ),( Chi-hsiang Hung ),( Wen-chung Kuo ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.3
In Internet, IP multicast has been used successfully to provide an efficient, best-effort delivery service for group communication applications. However, applications such as multiparty private conference, distribution of stock market information, pay per view and other subscriber services may require secure multicast to protect integrity and confidentiality of the group traffic, and validate message authenticity. Providing secure multicast for group communication is problematic without a robust group key management. In this paper, we propose a group key management scheme based on the secret sharing technology to require each member by itself to generate the group key when receiving a rekeying message multicast by the group key distributor. The proposed scheme enforces mutual authentication between a member and the group key distributor while executing the rekeying process, and provides forward secrecy and backward secrecy properties, and resists replay attack, impersonating attack, group key disclosing attack and malicious insider attack.
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On the Security of ”A Novel Elliptic Curve Dynamic Access Control System”
Wen-Chung Kuo,Lih-Chyau Wuu 보안공학연구지원센터 2009 International Journal of Security and Its Applicat Vol.3 No.2
In 2007, Wen et al. proposed a novel elliptic curve dynamic access control system. In this paper, we will show that the scheme is vulnerable to various attacks.
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