On the Security of Verifiable Privacy-preserving Multi-type Data Aggregation Scheme in Smart Grid

Data aggregation can not only achieve data compression, but also ensure the privacy of individual data, which is widely used in smart grid. To obtain in-depth data analysis and integrity of the transmitted data, Zhang et al. proposed a verifiable privacy-preserving multi-type data aggregation scheme in smart grid (DOI:10.1109/TDSC.2021.3124546, IEEE T DEPEND SECURE). They claim that their scheme can achieve the integrity of encrypted data and aggregated data. However, by analyzing Zhang et al.’s scheme, we find that it does not achieve the data integrity they claim. An adversary can arbitrarily tamper with the encrypted data of the smart meter and the aggregated data of the aggregation gateway. Then the corresponding attacks are given. Finally, after analyzing the reasons for such attacks, we provide a suggestion to overcome them.