The invention relates to the technical field of
data management, and discloses a medical data
secure transmission method and a
big data digital signature system, and the method comprises a hierarchical
processing step, a privacy enhancement step, a key negotiation step, a segmented transmission step and an audit tracking step. The
system comprises a signature preprocessing module, a hierarchical signature module, a privacy purification module, a
verification module and a tracing module. According to the method, a risk association map is constructed through hierarchical
processing, and accurate identification of
data association risks is realized; privacy and availability are balanced through differentiated privacy enhancement,
authorization controllability is enhanced in combination with block chain
key management, large
file transmission integrity and non-repudiation are guaranteed, and whole-course audit is controllable. According to the
system, the relevance between the signature and the privacy feature is improved through module design, the integrity and relevance of the signature chain are guaranteed,
privacy protection and verifiability are compatible, efficient
verification is achieved, the dispute
traceability is provided, and pediatric medical data safety is guaranteed in cooperation with the method.