The invention provides a data
authentication system, which comprises a management
server, at least one
mirror image server and an
authentication server, wherein the management server is used for receiving a first communication connection request, and transmitting a first digital
certificate and a second digital
certificate in the first communication connection request to the
authentication server; the at least one
mirror image server is used for receiving a second communication connection request, and transmitting the second digital
certificate and the first digital certificate in the second communication connection request to the
authentication server; the
authentication server is used for judging whether the management server and the at least one
mirror image server pass authentication or not, and if the management server and the at least one mirror
image server pass the authentication, a communication connection is allowed to be established between the management server and the at least one mirror
image server. The invention also provides a data authentication method. According to the technical scheme provided by the invention, the safety of
patient information in the management server and the at least one mirror
image server can be ensured, and therefore, the
patient information in the management server and the at least one mirror image server is prevented from being illegally read, and illegal information is prevented from being written in the management server or the at least one mirror image server.