An efficient and secure VoIP communication system with chaotic mapping and message digest

Abstract

As one of the most popular real-time services on the Internet, Voice over Internet Protocol (VoIP) has attracted researchers' attention in the information security field for its characters of real-time and high flow. To protect data security, a new covert VoIP communications system was proposed in this study to realize secure communications by hiding secret information in VoIP streams. In the proposed algorithm, secret data were divided into blocks after being encrypted with a block cipher, and then each block of secret data was embedded into VoIP streaming packets randomly by using a chaotic mapping. The symmetric key was distributed through an efficient and secure channel, and the message digest was implemented to protect the integrity of secret data. The experimental data were collected by comparing audio data between the sender and the receiver. The experimental results indicated that data embedding had little impact on the quality of speech. Besides, statistical analysis could not detect the secret data embedded in VoIP streams using the block cipher and random numbers generated from chaotic mapping. The proposed covert VoIP communications system not only achieved high quality of VoIP and prevented detection of statistical analysis, but also provided integrity for secret data.

A New Lightweight Stream Cipher Based on Chaos

“…As a new cryptographic theory, chaotic cryptography has been paid more and more attention by many cryptographers. Chaotic cryptography is widely used in image encryption [18][19][20][21][22], secure communication [23][24][25][26][27], neural network, and economics. However, a few scholars have tried to introduce chaotic systems into the field of lightweight encryption [28,29], and no one has tried to apply chaotic systems to lightweight stream ciphers.…”

VoIP Steganography Methods, a Survey

“…J i a n g and T a n g [19] in 2017 have proposed a method to embed the secret message using chaotic maps and message digest. Message digest was employed to encrypt the secret data using block cipher technique, which is then embedded in the voice packets using chaotic maps.…”

Novel two-directional grid multi-scroll chaotic attractors based on the Jerk system

“…It is well known that the chaotic system has the characteristics of sensitivity of initial value and complexity of trajectory, so chaos has great potential application in many engineering fields, such as weak signal detection, [1][2][3][4] random number generator, [5,6] secure communication, [7][8][9][10][11][12][13] and image encryption. [14][15][16][17][18][19][20] Furthermore, Lin et al [21,22] studied the influence of electromagnetic radiation on the chaotic characteristics of neural networks, and found that appropriate electromagnetic radiation is helpful to treat some neurological diseases.…”