The invention relates to the technical field of
encryption communication, in particular to a data
encryption communication method and
system applied to an intelligent cash register. The method comprises the following steps: collecting user touch data and equipment hardware fingerprints, and carrying out high-dimensional
feature fusion coding to obtain a joint identity
certificate; obtaining an original key negotiation protocol and transmission
metadata of an opposite-end
server, and executing multi-logic path mapping and channel
encryption configuration to obtain distributed
ciphertext channel parameters; encrypting the distributed
ciphertext channel parameters and the corresponding transmission
metadata, and then performing block content packaging and node hash calculation to obtain an audit chain hash block; performing
homomorphic encryption processing on the obtained real-time
transaction data to obtain a to-be-transmitted homomorphic
ciphertext; and performing communication transmission
anomaly detection on
information transmission data acquired in real time, and triggering dynamic key re-negotiation so as to improve the communication feedback capability. According to the invention, the overall security and stability of data encryption communication between the cash register and the back-end
server can be improved.