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A Ciphertext-Policy Attribute-Based Encryption Based on Multi-valued Decision Diagram

Abstract : Ciphertext-policy attribute-based encryption (CP-ABE) is a kind of asymmetric encryption which is widely used in cyber-physical system and Internet of Things. In CP-ABE, access structure is an important component affecting the efficiency and performance greatly in several stages, such as encryption stage, key generation stage, decryption stage. However, the existing CP-ABE schemes have low efficiency because of the application of traditional access structures. In order to alleviate the aforementioned problems, this paper proposes a brand-new access structure based on multi-valued decision diagram (MDD). According to this access structure, we design a new CP-ABE scheme which performs better than many current schemes. First, our scheme supports multi-valued attributes directly. Second, the size of secret key is constant because it bears no relationship to the number of attributes. Third, the time complexity of decryption stage is O(1).
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Submitted on : Tuesday, July 30, 2019 - 5:01:59 PM
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Shaowei Zhang, Long Li, Liang Chang, Tianlong Gu, Huadong Liu. A Ciphertext-Policy Attribute-Based Encryption Based on Multi-valued Decision Diagram. 10th International Conference on Intelligent Information Processing (IIP), Oct 2018, Nanning, China. pp.303-310, ⟨10.1007/978-3-030-00828-4_30⟩. ⟨hal-02197795⟩

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