A novel image Hash algorithm using Harris corners and invariant centroid is proposed.Originating from the mathematical model of affine transform

the distances between Harris corners and invariant centroid are calculated as feature vector

which based on the invariance of centroid of images in the affine transform

finally the feature vectors are compressed to generate the image Hash.Experimental results show that the proposed scheme is robust against perceptually acceptable modifications to the image such as JPEG compression

filtering

while sensitive to excessive changes and malicious tampering.Security of the Hash is guaranteed by using secret keys.