The invention discloses a spatiotemporal chaos secret communication method. The spatiotemporal chaos secret communication method comprises the steps that (1), the states of a space lattice of a one-way
coupling image lattice
system at a sending end are divided into odd-dimensional states and even-dimensional states, (2)
displacement mapping iteration is carried out on a
plaintext frame and vectors in the odd-dimensional states N times, (3) a transmission
signal is obtained, (4) a driving
signal of the one-way
coupling image lattice
system at the sending end is calculated, (5) a
synchronizing signal of the one-way
coupling image lattice
system at a receiving end is obtained, (6) the
displacement mapping iteration is decoded to obtain a decryption frame corresponding to the
plaintext frame, and then spatiotemporal chaos secret communication is achieved. According to the spatiotemporal chaos secret communication method, signals are coded and decoded by means of spatiotemporal chaos, the spatial state values of the one-way coupling image lattice system are grouped, iteration and
aliasing of a
plaintext secret key are carried out, better
confidentiality is achieved, the method can be achieved easily by means of a
microprocessor, integration can be achieved easily.