Speech Encryption Using Stream Cipher

Belmeguenaï, Aïssa; Mansouri, Khaled; Lashab, Mohamed

doi:10.9734/bjast/2015/14744

Cited by 11 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The speech signal in the first is recorded with pulse code modulation (PCM) system of 8 KHz sampling frequency and 16 resolution bits for each sample. Pre-processing functions is process to convert the sampled speech signal (s) into positive normalized value ( ̆) between 0 and (2 16 -1) according to the following equation [3]:…”

Section: Figure (1) Block Diagram Of Proposed Fixed Point Chaos Based...mentioning

confidence: 99%

See 1 more Smart Citation

Speech Encryption using Fixed Point Chaos based Stream Cipher (FPC-SC)

Hasan¹

2016

ETJ

View full text Add to dashboard Cite

Fixed point chaos based stream cipher (FPC-SC) is presented in this paper to encrypt the speech signal. Fixed point chaos based pseudo random bit generator (FPC-PRBG) is used as key sequence in stream cipher system. Two chaotic Lorenz and Chen systems are combined to generate Gold FPC-PRBG. The results show that FPC-PRBG has good statistical randomness and encryption performance measure and can be used to produce high speech security level. FPC-PRBG is implemented using Xilinx system generator (XSG) with Xilinx Virtex 4 FPGA device, the system is accessed routed in this device with throughputs 818.64,7978.88 and 780.24 Mbits/sec for Lorenz, Chen and Gold FPC-PRBG respectively, where 40 bits fixed point operation are used.

show abstract

Section: Figure (1) Block Diagram Of Proposed Fixed Point Chaos Based...mentioning

confidence: 99%

“…In analog encryption the speech signal is scrambled or permutated either in time or in frequency domain or in both [2]. In digital speech encryption, the signal can be encrypted using digital cryptosystem such as stream ciphers [1,3]. Also encryption can be classified according to key distribution into public and secret key.…”

Section: Introductionmentioning

confidence: 99%

Speech Encryption using Fixed Point Chaos based Stream Cipher (FPC-SC)

Hasan¹

2016

ETJ

View full text Add to dashboard Cite

show abstract

“…The most famous method of speech encryption methods is the scrambling technique [6], [7], in which either the speech signal is scrambled in the time domain or frequency domain or both the time and frequency domain. Another method to encrypt the speech signal is ciphering method [8][9][10][11], in which the stream cipher of the speech sequence is XORed with a pseudo-random bit generator (PRBG). The third method is the masking method [12,13] in which the scrambled speech signal is obtained by adding the speech signal with the chaotic signal.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Ciphering and Frequency Domain Scrambling for Secure Speech Transmission through MIMO-OFDM System

2022

IJIES

View full text Add to dashboard Cite

This paper suggests the transmission of secure speech signals through the MIMO-OFDM system over a doubly selective fading channel. The two-dimensional chaotic map like logistic (TDLM), standard (TDSM), and triangle function combination discrete chaotic map (TD-TFCDM) are used to generate pseudo-random bit generator (PRBG) and index permutation (IP) to encrypt the information based on ciphering and scrambling techniques. Different speech quality and residual intelligibility measures including log-likelihood ratio (LLR), frequency-weighted segmental signal-to-noise ratio (fwSNRseg), signal-to-noise ratio loss (SNRLOSS), correlation coefficient (CC) and spectrogram measures as well as Bit Error Rate (BER) performance are used to test the performance of the proposed security system. The simulation results show that the speech signal over the MIMO-OFDM system behaves well with high security. Also, the speech encryption system using TDSM and TD-TFCDM outperforms TDLM in most residual intelligibility measures.

show abstract

“…In digital speech encryption, the analog speech signal is transformed over analog to digital converter into digital stream bits and then summed up with "pseudo random bit generators" (PRBG) in mode 2. [8]. The advantage of analog methods is that it can be used by telephone analogies and band-limited radio systems while digital encryption techniques being more secure than analog [9].…”

Section: Introductionmentioning

confidence: 99%

FPGA Design of Encryption Speech system using Synchronized Fixed-Point Chaotic Maps Based Stream Ciphers

2019

ijeat

View full text Add to dashboard Cite

In this work, speech encryption using synchronized fixed-point chaotic map-based stream ciphers (SFPCM-SC) is suggested. Five chaotic maps named quadratic, henon, logistic, lozi and duffing are synchronized by using master-slave synchronization technique and then used to generate the pseudo random bit generator (PRBG) using fixed-point converter. The PRBG is then Xor-ed with digitized speech signal where the encrypted signal is created. In the other side, the same map is synchronized with the master one and used to recover the original speech signal. First this work is simulated by using MATLAB and then built the design using Xilinx system generator (XSG). Finally, the hardware co-simulation is applied for the proposed system by using FPGA SP605 XC6SLX45T device. The results show that the error between master and slave become zero after a small period and the original speech signal is recovered with real time environment in successful.

show abstract

Speech Encryption Using Stream Cipher

Cited by 11 publications

References 9 publications

Speech Encryption using Fixed Point Chaos based Stream Cipher (FPC-SC)

Speech Encryption using Fixed Point Chaos based Stream Cipher (FPC-SC)

Hybrid Ciphering and Frequency Domain Scrambling for Secure Speech Transmission through MIMO-OFDM System

FPGA Design of Encryption Speech system using Synchronized Fixed-Point Chaotic Maps Based Stream Ciphers

Contact Info

Product

Resources

About