Abstract
Cloud computing grants us the facility of storing the data and accessing it remotely over the internet. Data storage on the cloud does not guarantee the security of data. If the cloud server containing the information is being hacked or compromised, then any unauthorized user can access the data. To stop data leakage, some encryption schemes should be applied to data than uploading them on the cloud should begin. To guarantee the security Attribute-Based Encryption Scheme (ABE) is used. ABE is further categorized into two policies, Key Policy Attribute-Based Encryption (KP-ABE) and Cipher-text Policy Attribute-Based Encryption (CP-ABE). In this paper, the existing KP-ABE and CP-ABE have been studied broadly. This paper scrutinizes more on CP-ABE and compares various ABE schemes on the scale of their performance and features. Finally, in this paper, we try to catch out on the challenges and research gaps by examining the different ABE Schemes.
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