The invention discloses a user-authorized linkable
ring signature method for a financial science and technology block chain scene, which is applied to a financial scene of a block chain, mainly aims at cross-mechanism transaction
verification and
privacy protection, and is characterized in that anonymous
verification and
traceability of transaction records are realized in combination with an
authority control mechanism. The method specifically comprises the steps of
system initialization,
key generation, link secret generation, signature,
verification, linking,
authorization and link verification. Compared with the prior art, the method has the advantages that
user privacy protection is supported,
controllability and
traceability are achieved, and efficient verification is achieved, and it is ensured that
transaction data can be reliably verified while
user privacy is guaranteed in the loan approval or anti-money laundering (AML) auditing process of a
bank. According to the method, the problem that
privacy protection and
traceability are difficult to consider in a traditional signature scheme is avoided, and the security and practicability of cross-mechanism
data sharing are improved.