Two approaches for integrating encryption with multimedia compression systems are
studied in this research, ie, selective encryption and modified entropy coders with multiple …

Efficient encryption algorithms are essential to multimedia data security, since the data size
is large and real-time processing is often required. After discussing limitations of previous …

Two methodologies for efficient audiovisual data encryption are studied in this research, ie
selective encryption and MHT (multiple-Huffman-table). We first discuss benefits and …

Different pseudo-random or pseudo-noise (PN) as well as orthogonal sequences that can
be used as spreading codes for code division multiple access (CDMA) cellular networks or …

In this paper, a review of the techniques available in different categories of audio scrambling
schemes is done with respect to Residual Intelligibility. According to Shannon's secure …

In this paper, a new cryptography system (CS) is proposed and its VLSI architecture is
designed and verified. The new system performs both random position permutation and …

Audio scrambling can be employed to ensure confidentiality in audio distribution. We first
describe scrambling for raw audio using the discrete wavelet transform (DWT) first and then …

The authors propose a voice over Internet protocol (VoIP) technique with a new hierarchical
data security protection (HDSP) scheme. The proposed HDSP scheme can maintain the …

We analyze the effectivity of different pseudo noise (PN) and orthogonal sequences for
encrypting speech signals in terms of perceptual intelligence. Speech signal can be viewed …

In this paper, a new cryptography system is proposed. According to a generation scheme, a
binary sequence is generated from a chaotic system. Then, the sequence is used to …