US 12,355,860 B2
Correlation coefficient acquisition method, electronic device and non-transitory computer readable storage medium
Shengbo Peng, Beijing (CN); and Jiwen Zhou, Beijing (CN)
Assigned to BAIDU ONLINE NETWORK TECHNOLOGY (BEIJING) CO., LTD., Beijing (CN)
Filed by BAIDU ONLINE NETWORK TECHNOLOGY (BEIJING) CO., LTD., Beijing (CN)
Filed on Feb. 3, 2023, as Appl. No. 18/105,576.
Claims priority of application No. 202210116753.3 (CN), filed on Feb. 7, 2022.
Prior Publication US 2023/0254113 A1, Aug. 10, 2023
Int. Cl. H04L 9/00 (2022.01); H04L 9/08 (2006.01)
CPC H04L 9/008 (2013.01) [H04L 9/0869 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A correlation coefficient acquisition method, applied to a first participation node, comprising:
acquiring first original data, and homomorphically encrypting the first original data by using an associated key to determine first transmission data, wherein the associated key is jointly agreed by the first participation node and a second participation node;
sending the first transmission data to an auxiliary node so that the auxiliary node receives the first transmission data and performs a homomorphic operation on the first transmission data and second transmission data to obtain correlation coefficients between the first original data and second original data, wherein the second transmission data is determined by the second participation node homomorphically encrypting the second original data by using the associated key; and
receiving the correlation coefficients fed back by the auxiliary node;
wherein a sample data set used for training a federal model comprises the first original data, and the method further comprises:
screening the first original data comprised in the sample data set according to the correlation coefficients between the first original data and the second original data.