Attribute-based encryption (ABE) is crucial for ensuring data privacy in cloud computing environments, allowing secure storage and sharing of data. However, the rise of quantum processors poses a significant threat to existing cryptographic protocols by potentially compromising security measures like factoring large integers and computing discrete logarithms.

In response, this paper introduces a novel post-quantum attribute-based encryption scheme based on rank metric codes. Unlike previous schemes, our approach addresses key shortcomings such as verifiability, user privacy, and revocability simultaneously. By leveraging low rank parity check codes, our scheme is designed to resist chosen plaintext attacks in the standard model and provides robustness against reaction attacks, including chosen cipher text attacks.

Keyword: Attribute-based encryption, rank metric codes, user privacy, user revocation.