Abstract
It is now known that more information can be leaked into the smart grid environment than into the existing environment. In particular, specific information such as energy consumption data can be exposed via smart devices. Such a phenomenon can incur considerable risks due to the fact that both the amount and the concreteness of information increase when more types of information are combined. As such, this study aimed to develop an anonymous signature technique along with a signature authentication technique to prevent infringements of privacy in the smart grid environment, and they were tested and verified at the testbed used in a previous study. To reinforce the security of the smart grid, a password and anonymous authentication algorithm which can be applied not only to extendable test sites but also to power plants, including nuclear power stations, was developed. The group signature scheme is an anonymous signature schemes where the authenticator verifies the group signature to determine whether the signer is a member of a certain group but he/she would not know which member actually signed in. However, in this scheme, the identity of the signer can be revealed through an “opener” in special circumstances involving accidents, incidents, or disputes. Since the opener can always identify the signer without his/her consent in such cases, the signer would be concerned about letting the opener find out his/her anonymous activities. Thus, an anonymous signature scheme where the signer issues a token when entering his/her signature to allow the opener to confirm his/her identity only from that token is proposed in this study.
Highlights
The smart grid is a newly evolving next-generation intelligent power grid, and many technological research works were conducted in different countries over the last decade to increase the efficiency of their power grids
To limit the authority of the authenticator while maintaining the effectiveness of the group signature schemes, an anonymous signature scheme which authorizes the authenticator to identify the signer only with the token issued by the signer him/herself when generating a signature is proposed in this study
The anonymous signature scheme allows authentication of the signer without revealing his/her identity, whereas the group signature scheme is a method of verifying that the signer is a member of a identity, whereas the group signature scheme is a method of verifying that the signer is a member certain group, without exposing the signer’s identity
Summary
The smart grid is a newly evolving next-generation intelligent power grid, and many technological research works were conducted in different countries over the last decade to increase the efficiency of their power grids. The security of personal information is called into question as many users consider that the opener has sufficient power to identify the signer and obtain the latter’s personal information or information on anonymous activities for other purposes. To resolve this problem, Sakai et al [9]. To limit the authority of the authenticator while maintaining the effectiveness of the group signature schemes, an anonymous signature scheme which authorizes the authenticator to identify the signer only with the token issued by the signer him/herself when generating a signature is proposed in this study
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