CHAOTIC MAP-BASED DIGITAL CHAOTIC ENCRYPTION METHOD

摘要

The present invention relates to a chaotic map-based digital chaotic encryption method, the encryption method comprising the following steps: step 1: sending plaintext data to be encoded, and converting the plaintext data into a binary array code; step 2: performing discrete mapping on the binary array code obtained in step 1 to obtain a chaotic code; step 3: performing, by using a key parameter K, fuzzy mapping on the chaotic code obtained in step 2 to obtain a serial code; step 4: constructing ciphertext data by using the serial code obtained in step 3; and step 5: transmitting the ciphertext data obtained in step 4 to a receiving party via a public channel. The encryption method achieves a signal masking function having a spreading code mapping property as well as a parallel data processing function for parallel chaotic mapping. Compared to the conventional encryption system, the encryption method has a better security performance and data processing efficiency, and is more applicable to optical fiber communications.