	US 12,238,197 B2
	Utilizing homomorphic properties for image encryption and decryption
Mamadou Ibra Wade, Berwyn Heights, MD (US)
Assigned to HOWARD UNIVERSITY, Washington, DC (US)
Appl. No. 17/057,950
Filed by Howard University, Washington, DC (US)
PCT Filed May 24, 2019, PCT No. PCT/US2019/033948 § 371(c)(1), (2) Date Nov. 23, 2020, PCT Pub. No. WO2019/227009, PCT Pub. Date Nov. 28, 2019.
Claims priority of provisional application 62/675,797, filed on May 24, 2018.
Prior Publication US 2021/0211269 A1, Jul. 8, 2021
Int. Cl. H04L 9/00 (2022.01); H04L 9/30 (2006.01); H04L 9/14 (2006.01)

CPC H04L 9/008 (2013.01) [H04L 9/3006 (2013.01); H04L 9/14 (2013.01); H04L 2209/12 (2013.01)]

32 Claims

1. A method of image encryption with homomorphic properties, the method comprising:

determining with a processing device a pixel intensity value for respective individual pixel of an image comprising a number of pixels, wherein the pixel intensity value for the respective individual pixel is a sum of at least two pixel intensity sub-values for the respective individual pixel;

separating with the processing device the at least two pixel intensity sub-values from the pixel intensity value for respective individual pixel; and

applying with a processing device an encryption function to each of the at least two pixel intensity sub-values, for individual pixels, to create a set of encrypted pixel sub-values corresponding to each of the at least two pixel intensity sub-values for the individual pixels, wherein a sum of the set of encrypted pixel sub-values is equal to an encrypted pixel intensity value for the respective pixel, and the homomorphic properties are utilized for encryption and decryption of the image.