Data Destruction Mechanism Based on AONT-CTR and Blockchain

This paper proposes a time-controlled data destruction scheme based on AONT-CTR encryption and smart contracts to address the challenges of achieving trusted data destruction and preventing data leakage. The study first explores the All-Or-Nothing Transformation (AONT) in data preprocessing and compares different operating modes of the AES algorithm. Building on this foundation, the paper introduces the AONT-CTR encryption method, which offers strong indivisibility. A data destruction strategy is then designed, based on data overwriting standards and smart contracts, which narrows the scope of destruction from the entire dataset to key information, such as the encrypted data header and encrypted keys. By overwriting these critical components, complete data destruction is ensured. Experimental results demonstrate that the proposed scheme provides both superior reliability and performance compared to conventional data destruction methods. When destroying 1,000 data files, the proposed method consumes only 56% of the time required by traditional approaches, confirming its efficiency and feasibility.