Patent ID: 10826969

Abstract:
A method and associated system. A server computer selects a re-ordering scheme for re-ordering chunks of an original file that includes N chunks. N is at least 2. The server computer divides the file into the chunks. The server computer re-orders the chunks according to the selected re-ordering scheme to form an obfuscated file that includes the re-ordered chunks. The selected re-ordering scheme specifies for each chunk in the original file a position of said each chunk in the obfuscated file. The re-ordering includes performing N iterations such that in iteration I the position of chunk I in the obfuscated file is determined to be the position of chunk I specified in the selected re-ordering scheme (I=1, 2, . . . N). The server computer sends, to a client computer, the obfuscated file along with a scheme access reference that enables the client computer to access the selected re-ordering scheme.