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Bhalla, Harshit (2024) Blockchain-Based Framework for Secure Cloud Storage with Data Integrity Verification. Masters thesis, Dublin, National College of Ireland.
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Abstract
Today, Data is considered as an invaluable asset. Cloud computing have drastically transformed management of data by providing cost efficient and scalable data storage solutions, however their centralised architecture poses considerable challenges such as unauthorised access and data breaches and attacks to data integrity, hence it is essential to protect sensitive data. These challenges are addressed by combining decentralised technology blockchain and cryptographic techniques to develop a secure platform for storing sensitive data to cloud. The proposed system employs Advanced Encryption Standard (AES-256) to encrypt user data ensuring confidentiality on cloud storage and to preserve integrity of data, achieving a 100% detection accuracy in integrity verification tests. Merkle tree-based approach is implemented, allowing users to verify authenticity of the data and detect tempering of data. The system also supports periodic integrity verification feature that allows user to enable automated integrity check for their data. This approach offers real time alerts in the event of file integrity violation. The platform is designed as a web application, providing users with interface to securely store, manage and verify integrity of data over cloud. The result of study shows that blockchain technology can enhance the security and ensure integrity of the data over cloud storage system.
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