Attribute-Based Encryption with Equality Test in Cloud Computing Using Key-Policy

The privacy of users should be thought of because the utmost priority in distributed networks. To protect the identities of users, attribute-based encoding (ABE) was presented by Sahai et al. ABE has been wide utilized in several situations, significantly in cloud computing. During this paper, public key encoding with equality check is concatenated with key-policy ABE (KP-ABE) to present KP-ABE with equality test (KP-ABEwET). The projected theme not solely offers ne-grained authorization of cipher texts however additionally protects the identities of users. In contrast to ABE with keyword search, KP-ABEwET will take a look at whether or not the cipher texts encrypted by completely different public keys contain constant data. Moreover, the authorization process of the conferred theme is additional edible than that of Ma et al.'s scheme. Moreover, the projected scheme achieves one-way against chosen-cipher text attack supported the additive Dife Hellman (BDH) assumption. Additionally, a brand new procedure drawback referred to as the twin-decision BDH downside (tDBDH) is proposed during this paper. tDBDH is established to be as laborious because the decisional BDH downside. Finally, for the rest time, the protection model of authorization is provided, and also the security of authorization supported the tDBDH assumption is proved within the random oracle model.