Jin Jianguo, Wang Le, Wei Mingjun, Su Jingjing. Video encryption based on chaotic key modulating DFRFT rotation factor[J]. Journal of Image and Graphics, 2013, 18(12): 1567-1573. DOI: 10.11834/jig.20131203.
fractional Fourier transform (FRFT) is rarely used in real-time video encryption. While at present
the simple chaotic encryption algorithms have many security problems. Consequently
a new real-time video encryption algorithm-chaotic key modulating discrete fractional Fourier transform (DFRFT) rotation factor is proposed. This algorithm combines chaotic encryption with DFRFT. First
we modulate the DFRFT rotation factor by a chaotic key. Second
we use the modulated rotation factor to carry on fractional Fourier transform
so as to complete the encryption operation for video data. The encryption system realizes real-time acquisition
real-time encryption and transmission
as well as real-time reception
real-time decryption and playing at the receiving terminal. The experimental results show that the system has a good effect in the encryption and decryption and can meet our real-time and security requirements. The theoretical analysis on the experiment results indicate that this algorithm is simple and practicable
with a high-level of security. The security of the algorithm is better than simple chaotic encryption algorithm or the simple FRFT encryption algorithm. We can draw a conclusion from results that this algorithm provides a novel mechanism for resolving the dispute between real-time and security.