Masking (illustration)

Algorithm

World Wide Web

Pixel

Chaotic

Materials science

Theoretical computer science

Encryption

Operating system

Palette (painting)

Computer science

Visual arts

Computer network

Matrix (chemical analysis)

Index (typography)

Image (mathematics)

Artificial intelligence

Composite material

Computer vision

According to the feature of palette image, a chaotic encryption algorithm for image of palette format is proposed in this paper. In the algorithm, the index matrix of pixel and the palette are both encrypted. In the encryption procedure of the index matrix, the position and value of an index are both encrypted, after multi-rounds, the ciphered index matrix is obtained, and in the masking procedure of palette, the masking operation performed only on the values for the purpose of efficiency. The encryption procedure of index matrix of pixel is independent from that of palette, so the two procedures can be performed selectively for deferent security requirements.

A Chaotic Encryption Algorithm for Palette Image