As a symmetric encryption algorithm, multiple-parameter fractional Fourier transform (MPFRFT) is proposed and applied to image encryption. The MPFRFT with two vector parameters has better security, which becomes the main technical means protect information security. However, our study found that many keys of are invalid, greatly reduces its In this paper, we propose new reformulation analyze it...

<span>Image security is still one of the important fields in multimedia processing because it’s used our daily lives. Watermarking, steganography, and ciphering are three directions to keep an image secret. Encryption defined as process changing information (which called plaintext) into unreadable secret format cipher-text). A new algorithm based on binary decomposition codes conversion p...

This paper proposes a new image encryption algorithm. First, time-domain and frequency-domain features of the user’s voice are extracted to generate key. Second, key is iterated through chaotic map multiple times data oscillation region, and, subsequently, parameters area used encrypt image. Third, at time decryption, latest re-extracted decrypt encrypted The cannot be successfully decrypted if...