A symmetric cryptosystem uses cascaded chaotic maps to encrypt plaintext and decrypt ciphertext. Received plaintext is encrypted using the cascaded chaotic maps to generate a ciphertext. The ciphertext can then be decrypted using the same cascaded chaotic maps in order to retrieve the plaintext....http://www.google.com.tw/patents/US7912212?utm_source=gb-gplus-share專利 US7912212 - Symmetric cryptosystem using cascaded chaotic maps