Revisiting Attribute-Based Encryption with Verifiable Outsourced Decryption
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Revisiting Attribute-Based Encryption with Verifiable Outsourced Decryption
Abstract— Revisiting Attribute-Based Encryption with Verifiable Outsourced Decryption. Attribute-based encryption < Final Year Projects 2016 > ABE [1] is a promising technique for fine-grained access control of encrypted data in a cloud storage, however, decryption involved in ABEs is usually too expensive for resource-constrained front-end users, which greatly hinders its practical popularity. In order to reduce the decryption overhead for a user to recover the plaintext, Green et al. [2] suggested to outsource the majority of the decryption work without revealing actually data or private keys. To ensure the third-party service honestly computes the outsourced work. Lai et al. provided a requirement of verifiability to the decryption of ABE [3], but their scheme doubled the size of the underlying ABE cipher text and the computation costs.
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