The invention relates to the technical field of private
data security sharing, and discloses a cross-platform rights and interests joint
data security sharing method, which comprises the following steps: generating a
timestamp based on a
data fragment corresponding to a user rights and interests related
data fragment, and carrying out time attenuation and private sketch mapping
processing; performing two rounds of independent blinding
processing on the low-dimensional private sketch by using the platform side blinding factor and the collaborative side blinding factor; performing consistency aggregation
processing on the
double blind sketches from the same user main body by using a verifiable threshold aggregation protocol; and generating a main body identity
verification token of the consistency aggregation result by adopting a service identity generation
algorithm, and carrying out cross-platform
data security sharing. According to the method, on the premise of not exposing original rights and interests data,
time perception modeling,
privacy protection mapping and consistency judgment are carried out on the rights and interests of the cross-platform user main body, a verifiable main body identity
verification token is generated, and cross-platform rights and interests updating and data security sharing are achieved.