CHAOTIC MAP-BASED DIGITAL CHAOTIC ENCRYPTION METHOD

摘要

The invention relates to a chaotic map-based digital chaotic encryption method comprising the following steps: Step 1: transmitting 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 from Step 1 to obtain a chaotic code; Step 3: performing, using a key parameter k, fuzzy mapping on the chaotic code obtained from Step 2 to obtain a serial code; Step 4: constructing, using the serial code obtained from Step 3, ciphertext data; and Step 5: transmitting, via a public channel, and to a receiving party, the ciphertext obtained from Step 4. The encryption method achieves a signal masking function having a mapping property of a spreading code, and a parallel data processing function providing parallel chaotic mapping. In comparison to the conventional encryption system, the encryption method has enhanced security performance and data processing efficiency, and is more suitable for optical communications.