The weighted fractional Fourier transform （WFRFT） technology can greatly change the characteristics of the signal and diversify the statistical characteristics of the signal. Thus the security of communication information is ensured. In order to solve the problem of insufficient anti-scanning ability of single-parameter WFRFT communication， taking single-parameter WFRFT as an entry point， the formation mechanism of single-parameter fractional domain is deeply studied， and its potential microscopic features and dark features are analyzed. So an implicit WFRFT communication method of jump vector （IWVJ） is proposed. Using the relationship between the modulation order and the constellation diagram， the hopping matrix and the hopping vector are established. And the control rules are formulated. In addition， the dynamic modulation order is obtained through the hopping vector control to achieve safe communication. Simulation results show that the IWVJ method has higher inverse transform demodulation similarity and lower bit error rate for licensed receivers， which is better than unlicensed receivers with universal scanning capability. At the same time， the appropriate suggestions for the setting of the demodulation order error， the basic modulation order and the jump frequency are given， so that the IWVJ method can be better applied to communication systems， and provide security information with anti-jamming， anti-interception and anti-spoofing capabilities.