TY  - JOUR
T1  - Speech Encryption Based on Zaslavsky Map
AU - F. Yousif, Sura 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 17
SP  - 6392
EP  - 6399
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.6392.6399
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.6392.6399
KW  - Speech
KW  -encryption
KW  -decryption
KW  -cryptography
KW  -security
KW  -chaos
KW  -Zaslavsky map
KW  -permutation
KW  -substitution
KW  -analysis
KW  -quality metrics.
AB  - In information transmission such as speech information, higher security and confidentiality are
especially required. Therefore, data encryption is pre–requisite for secure communication system to protect such
information from unauthorized access. In this research, a new speech cryptographic technique based on
combination of permutation and substitution of speech samples using chaotic Zaslavsky map is presented. The
original speech signal is first, transformed from one dimensional to two dimensional blocks. Then Zaslavsky
map is utilized to produce permutation and mask keys to be used in permutation and substitution processes.
Third, each block is permuted to shuffle the positions of speech signal samples followed by substitution
process to change the values of permuted samples. And finally, encrypted blocks are transformed back into
one dimension to produce ciphered speech signal ready for transmission. The results demonstrate that the
presented speech cryptosystem provides a high level of security, confidentiality and high intelligibility
reconstructed speech signal.
ER  -