EABE-PUFPH: Efficient Attribute-Based Encryption With Reliable Policy Updating Under Full Policy Hiding

Ciphertext-policy attribute-based encryption (CP-ABE) has garnered significant attention for enabling fine-grained access control over encrypted data in cloud environments. However, in traditional CP-ABE schemes, access policies are transmitted in plaintext, which can lead to sensitive information leakage. To mitigate this risk, hiding access policies has become essential. Under the condition of full hidden access policies, realizing efficient and accurate decryption and dynamic policy updating has become an urgent challenge. To tackle these challenges, we present an efficient attribute-based encryption with reliable policy updating under full policy hiding (EABE-PUFPH) scheme, which effectively integrates full policy hiding with policy updating capabilities. Furthermore, we conduct a rigorous security analysis and performance evaluation of the EABE-PUFPH scheme. Evaluation results show that the EABE-PUFPH scheme achieves full hidden access policies without affecting decryption efficiency, and its efficiency surpasses other similar schemes that achieve full policy hiding.