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The Smart Grid allows users to access information related to their electricity usage via IP networks. Both the validity and the privacy of such information should be guaranteed. Consumers’ electricity bills can then be charged directly to them via the Smart Grid, even outside their homes. Such information from this bill is strictly related to the privacy of consumers; hence, we propose an anonymous authentication protocol for electricity usage on the Smart Grid. Our main idea is to utilize group signatures with controllable linkability . In these group signatures, only designated signers can generate digital signatures with anonymity under a single group public key, and only entities with a link key can distinguish whether the signatures are generated by the same signer or not. Whereas our proposed protocol can include any group signature scheme with controllable linkability, we also propose new controllably linkable group signatures with tokens, which are handled by smart meters on the Smart Grid. We implement the proposed group signatures, and then estimate the computational time of our anonymous authentication protocol at about one-and-a-half seconds on Raspberry Pi.
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- An Anonymous Authentication Protocol for the Smart Grid
- Chapter 3
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