Fuzzy Elliptic Curve Cryptography based Cipher Text Policy Attribute based Encryption for Cloud Security

Cipher Text Policy Attribute Based Encryption which is a form of Public Key Encryption has become a renowned approach as a Data access control scheme for data security and confidentiality. It not only provides the flexibility and scalability in the access control mechanisms but also enhances security by fuzzy fined-grained access control. However, schemes are there which for more security increases the key size which ultimately leads to high encryption and decryption time. Also, there is no provision for handling the middle man attacks during data transfer. In this paper, a light-weight and more scalable encryption mechanism is provided which not only uses fewer resources for encoding and decoding but also improves the security along with faster encryption and decryption time. Moreover, this scheme provides an efficient key sharing mechanism for providing secure transfer to avoid any man-in-the-middle attacks. Also, due to fuzzy policies inclusion, chances are there to get approximation of user attributes available which makes the process fast and reliable and improves the performance of legitimate users.

I. Introduction

Due to globalization and growth of network, there has been a lot of trend of online data sharing. Everybody wants to celebrate their success and their emotions with their friends. So, people are using various social networking applications like Facebook, Twitter, Instagram and so on. [1] [2]. People every day are generating huge data and cloud is the most promising application platform for solving the problem of huge data storage. These days almost everyone is using cloud for data storage as it provides various features in terms of scalability, on demand provisioning, elasticity and pay as per use. But security is one field which always concerns the users while taking cloud services.