Authorized Attribute-Based Encryption Multi-Keywords Search with Policy Updating
نویسندگان
چکیده
منابع مشابه
Key-Policy Multi-authority Attribute-Based Encryption
Bilinear groups are often used to create Attribute-Based Encryption (ABE) algorithms. In particular, they have been used to create an ABE system with multi authorities, but limited to the ciphertext-policy instance. Here, for the first time, we propose two multi-authority key-policy ABE systems. In our first proposal, the authorities may be set up in any moment and without any coordination. A p...
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In classical encryption schemes, data is encrypted under a single key that is associated with a user or group. In Ciphertext-Policy Attribute-Based Encryption(CP-ABE) keys are associated with attributes of users, given to them by a central trusted authority, and data is encrypted under a logical formula over these attributes. We extend this idea to the case where an arbitrary number of independ...
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In Ciphertext Policy Attribute based Encryption scheme, the encryptor can fix the policy, who can decrypt the encrypted message. The policy can be formed with the help of attributes. In CP-ABE, access policy is sent along with the ciphertext. We propose a method in which the access policy need not be sent along with the ciphertext, by which we are able to preserve the privacy of the encryptor. ...
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In an identity based encryption scheme, each user is identified by a unique identity string. An attribute based encryption scheme (ABE), in contrast, is a scheme in which each user is identified by a set of attributes, and some function of those attributes is used to determine decryption ability for each ciphertext. Sahai and Waters introduced a single authority attribute encryption scheme and ...
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Attribute-based encryption (ABE) enables limiting access to encrypted data to users who possess certain attributes. Different aspects of ABE have been studied, such as the multi-authority setting (MA-ABE), and policy hiding, meaning the access policy is unknown to unauthorized parties, as in predicate encryption (PE). However, no practical scheme so far provided both properties, which are often...
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ژورنال
عنوان ژورنال: Journal of New Media
سال: 2020
ISSN: 2579-0110
DOI: 10.32604/jnm.2020.09946