Secure File Storage On Cloud Using Hybrid Cryptography

Abstract

As technology today is moving forward exponentially, data exchange over the Internet has become a daily routine. Furthermore, businesses are growing internationally and offices are being established in a variety of different places throughout the world. This has resulted in the necessity to make data accessible and practical from any place. As a result, information sent via an may lead to critical security problems involving the breach of secrecy, authentication, and data integrity. This paper introduces a cloud storage system by utilising hybrid cryptography approach that leverages both advantages of symmetric key and asymmetric key cryptographic techniques. In our proposed system, the symmetric key algorithm AES is utilised to encrypt data, whereas the asymmetric key algorithm ElGamal is employed to perform key encryption before the data upload into cloud storage. Combining both symmetric key and asymmetric key methods alleviates privacy issues while increasing data confidentiality. In addition, a hash function which is SHA-2 is executed before the encryption process and after the decryption process. Both hash values are derived through a hashing procedure and matched in order to verify the data integrity. However, if the users' accounts were lost or stolen, all encryption would be meaningless. Hence, a Two-Factor Authentication (2FA) is also employed to minimise the abovementioned risk to achieve a greater security over the cloud environment.

An In-Depth Analysis on Efficiency and Vulnerabilities on a Cloud-Based Searchable Symmetric Encryption Solution

“…Finally due to restricting our work mainly in the symmetric key domain, our search efficiency is theorized to perform faster than the prototype by Lai and Heng, 2022 [34] which utilizes asymmetric key cryptography, but it would be interesting to see a side-by-side comparison. Another avenue of research is to see if the same leakage attacks that we study will work on their prototype and if not, how effective are the defenses.…”

Comprehensive Review and Analysis of Cryptography Techniques in Cloud Computing

“…We deliver a symmetric key along with the encrypted data. Once we receive the data, we can use a private key to decipher the symmetric key and decrypt the actual data [95]. The fundamental procedures of hybrid encryption are visually depicted in Figure 5, and Table 8 offers a thorough summary of the various types of hybrid cryptography, allowing for comparative analysis.…”

Secure and efficient data storage with Rivest Shamir Adleman algorithm in cloud environment

“…This method used the benefits of symmetric and asymmetric key cryptographic approaches to achieve optimal performance. Jian-Foo and Swee-Huay [15] developed, a method to be decentralized. It uses the AES and RSA algorithms to provide a framework that prohibits unauthorized entities from gaining access to the data or messages of users.…”