  Advancements in communication and information tech birthed the Smart Grid,
optimizing energy and data transmission. Yet, user privacy is at risk due to
frequent data collection. Existing privacy schemes face vulnerability with
quantum machines. To tackle this, the LPM2DA scheme is introduced, utilizing
lattice-based encryption and signatures for secure data aggregation. It ensures
privacy, integrity, and authentication, enabling statistical analysis while
preserving user privacy. Traditional aggregation schemes suffer from weak
network models and centralization issues. Enter SPDBlock, a blockchain-based
solution ensuring privacy, integrity, and resistance to attacks. It detects and
prosecutes malicious entities while efficiently handling multi-dimensional data
transmission. Through distributed decryption and secret sharing, only valid
data can be decrypted with minimal involvement from smart meters. Performance
tests reveal SPDBlock's superiority in communication and computational
efficiency over traditional schemes.
