An Privacy Preserving and Multi-copy Supporting PDP Algorithm and its Application in Component Testing Tool

Aiming at the problem of malicious data deletion or tampering in the untrusted server-side storage, an improved PDP (Provable Data Possession) algorithm supporting privacy protection and multiple copies is proposed in the paper. BLS signature and encrypted copies with random mask are adopted in the algorithm. The implementation of the algorithm is described in detail. Experimental results show that the proposed algorithm achieves better performance compared with the MR-PDP algorithm proposed by Cutmola [6]. Finally, the algorithm is applied in a component testing tool to verify the integrity of component source files before component downloading and deployment.