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Secure Lattice-Based Ciphertext-Policy Attribute-Based Encryption from Module-LWE for Cloud Storage
G. Sravya (National Institute of Technology Warangal, Institute for Development and Research in Banking Technology), Pasupuleti Syam Kumar (Institute for Development and Research in Banking Technology), R. Padmavathy (National Institute of Technology Warangal)
Abstract: Ciphertext-Policy Attribute-Based Encryption (CPABE) is the most promising scheme to achieve fine-grained access control and data privacy in a cloud environment by offering oneto-many encryption. However, most existing CP-ABE schemes are fragile to quantum attacks because they are constructed using bilinear pairing assumptions. This paper proposes a Secure Lattice-Based CP-ABE scheme (SL-CP-ABE) from the Module Learning With Errors (M-LWE) to defend against quantum attacks and to realize fine-grained access control and data privacy in the cloud storage. The security of SL-CP-ABE proved against the Indistinguishable Selective Chosen Plaintext Attack (INDsCPA) under the hardness of the M-LWE. The performance analysis demonstrates that the SL-CP-ABE scheme is efficient and practical.