Each 7 series device has a unique device ID called device DNA that has already been programmed into it by Xilinx. 7 series devices have a 64-bit DNA. You can read these bits by running the following Tcl command in the Vivado Design Suite Tcl Console:
get_property [lindex [get_hw_device] 0] REGISTER.EFUSE.FUSE_DNAYou can also access the device DNA by viewing the eFUSE registers in the Hardware Device Properties window in Vivado Design Suite as shown in the following figure.
Figure 1. eFUSE DNA
For more information on these features, see the 7 Series FPGAs Configuration User Guide (UG470).