A Decentralized Public Auditing Scheme for Secure Cloud Storage Based on Blockchain

Algorithm 4

Malicious DU detecting

1: DU verify whether the received data is correct by checking the equation

2: if This equation holds then

3:  accepts the data .

4: else

5:  divides DU before into two groups: . Then checks if .

6: if The above equation holds then

7:  The malicious DU exists in . computes , then verifies if .

8:  if The equation is satisfied then

9:   The malicious DU belongs to , continues to search through binary search until it finds the malicious DU .

10:  end if

11: else

12:  The malicious DU exists in . continues to search through binary search until it finds the malicious DU .

13:  end if

14: end if