ZERO-KNOWLEDGE MULTI-ACCOUNT-BOOK EXCHANGE TRANSFER METHOD AND APPARATUS BASED ON BLOCKCHAIN, AND STORAGE MEDIUM

摘要

Disclosed is a zero-knowledge multi-account-book exchange transfer method and apparatus based on blockchain, and a storage medium. The method comprises: a first user account under a first account book in a blockchain issuing a transaction request with a second user account under a second account book, and receiving a first ciphertext generated by means of a first user performing encryption (S10); acquiring the first ciphertext that has been subjected to a digital signature and a first verification ciphertext (S20); calculating each corresponding first verification value ciphertext by means of several preset legal exchange rate values and the first ciphertext; calculating, by using the first verification value ciphertext and the first verification ciphertext, a second verification value ciphertext for verifying whether a preset exchange rate of the transaction between the first account book and the second account book is within a preset legal exchange rate value range (S30); and if so, completing the transfer transaction based on the first ciphertext and the first verification ciphertext (S40). By means of the method, a multi-account-book transfer operation can be implemented when it can be proved that a multi-account-book transfer transaction is carried out in a legal exchange rate domain set in advance, but when a third-party does not know the specific exchange rate.