The invention discloses a judicial
data security sharing and tracing method based on a block chain technology, and the method comprises the following steps: S1, initializing a block
chain network, generating a node reputation value, and binding an identity
label; s2, constructing a double-
chain structure, storing the encrypted data, recording an access behavior, and establishing a cross-chain
index mapping relationship; s3, extracting identity information of an access subject, executing attribute
encryption, writing in a
data link, and
synchronizing a cross-chain index; s4, after an access request is received, permission
verification is completed through the
smart contract, and a behavior
record abstract is generated; s5, binding the behavior abstract and judicial data through a cross-chain index, and recording the behavior abstract and the judicial data to a behavior chain to form a complete on-chain behavior
record; s6, calling a zero-knowledge cross-chain protocol to verify
data consistency, and completing document transmission according to a joint permission strategy; and S7, tracking all access records through a behavior chain, wherein the whole transmission process is traceable. According to the invention, safe sharing of judicial data,
authority control and behavior tracing are realized.