User Privacy Protection Scheme Based on Verifiable Outsourcing Attribute-Based Encryption

Abstract

Given the rapid development of cloud computing and cloud storage technology, a growing number of enterprises and individuals use cloud storage services to save data or back up data. In the cloud storage services, although attribute-based encryption can protect users’ data security, the computational cost of key generation, data encryption, and data decryption linearly increases with the complexity of access strategies, which becomes more critical for resource-constrained users. Therefore, this paper proposes a verifiable attribute-based encryption scheme for a fully outsourced ciphertext policy. The scheme can simultaneously realize the functions of key generation, data encryption, and data decryption outsourcing and verify the correctness of the outsourcing calculation results. This scheme can effectively reduce the computational burden of a cloud storage system. The security and verifiability of the scheme are indicated and proved with the random oracle model. The experimental results show that the scheme has the advantages of function and efficiency compared with other schemes. The research results have theoretical and practical significance.

Autonomous and Sustainable Service Economies: Data-Driven Optimization of Design and Operations through Discovery of Multi-Perspective Parameters

“…Privacy protection services are designed to safeguard personal data and prevent unauthorized access, use, or disclosure [248]. Encryption is a key technology used in these services [249,250]. There are several other important technologies used in privacy protection services, such as IoT access control, privacy-aware authentication, single sign-on, virtual identity, and identity-as-a-service (IDaaS).…”

Soft Set Decision and Cluster Percolation Method-Based Policy Clustering and Encryption Optimization for CP-ABE

“…Therefore, improving CP-ABE encryption/decryption efficiency is a non-trivial issue. As a result, researchers have made substantial efforts to enhance encryption and decryption efficiency [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Among them, [3][4][5][6][7] are about improving encryption efficiency.…”

“…Researchers have made efforts to address the efficiency concerns in decryption [8][9][10][11][12][13][14][15][16]. Green et al [8] introduced a CP-ABE scheme that outsources decryption operations to a third party.…”

“…Li et al [14] proposed a constant ciphertext length CP-ABE scheme that supports outsourcing encryption and decryption operation, significantly reducing communication costs. Zhang et al [15] and Sheng [16], respectively, proposed fully outsourced CP-ABE schemes, enabling the outsourcing of key generation, encryption, and decryption. However, all of the mentioned approaches [3][4][5][6][7][8][9][10][11][12][13][14][15][16] address the issue of excessive computational overhead primarily by improving the algorithms' efficiency.…”

“…Zhang et al [15] and Sheng [16], respectively, proposed fully outsourced CP-ABE schemes, enabling the outsourcing of key generation, encryption, and decryption. However, all of the mentioned approaches [3][4][5][6][7][8][9][10][11][12][13][14][15][16] address the issue of excessive computational overhead primarily by improving the algorithms' efficiency.…”