Coupled Map Networks as Communication Schemes
  Networks of chaotic coupled maps are considered as string and language generators. It is shown that such networks can be used as encrypting systems where the ciphertext contains information about the evolution of the network and also about the way to select the plaintext symbols from the string associated to the network evolution. The secret key provides the network parameters, such as the coupling strengths. 
P. Garcia, A. Parravano, M. G. Cosenza, J. Jimenez, and A. Marcano