A Combined Encryption and Error Correction Scheme: Aes-Turbo

IEE Proceedings - Communications, 2006

Both security and error control coding are very extensive subjects, each with a variety of sub-disciplines. A secure channel coding (joint encryption-channel coding) scheme provides both data secrecy and data reliability in one process to combat problems in an insecure and unreliable channel. In this paper, an adaptive secure channel coding scheme based on serial or parallel concatenated turbo codes is developed. Recent results indicate that the turbo principle delivers near-to-optimal strategies for the channel coding. Reliability and security are achieved by adapting the pseudo-random puncturing strategy to the conditions of the noisy channel. Simulation results show the relevance and superior performance of the proposed scheme at all signal-to-noise ratio levels.

2008 International Symposium on Telecommunications, 2008

Turbo code has the capability of error correction near Shannon's limit. This code is concatenated of 2 recursive convolutional codes with pseudo random interleaving. In this paper secure turbo code performance in Rayleigh, Rician fading and NONGEO satellite channels are simulated and analyzed. Simulation results show that this code has appropriate performance in wireless channel in presence of light shadowing, and good performance in heavy shadowing. This scheme has the advantages of High-speed encryption and decryption with high security, smaller encoder and decoder size and greater efficiency.

2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010

In conventional communication systems, error correction is carried out at the physical layer while data security is performed performed at an upper layer. As a result, these steps are done as separate steps. As opposed to this conventional system, we present a scheme that combines error correction and data security as one unit so that both encryption and encoding could be carried out at the physical layer. Hence, in this paper, we present an Error Correction Based Cipher (ECBC) that combines error correction and encryption/decryption in a single step. Encrypting and encoding or decoding and decrypting in a single step will lead to a faster and more efficient implementation. One of the challenges of using previous joint schemes in a communications channel is that there is a tradeoff between data reliability and security. However in ECBC, there is no trade off between reliability and security. Errors introduced at the transmitter for randomization are removed at the receiver. Hence ECBC can utilize its full capacity to correct channel errors. We show the result of randomization test on ECBC and its security against conventional attacks. We also present the result of the FPGA implementation of the ECBC encryption.

Computer Engineering and Intelligent Systems, 2012

Advanced Encryption Standard (AES) [1, 2] is a great research challenge. It has been developed to replace the Data Encryption Standard (DES). AES suffers from a major limitation of Error propagation effect. To tackle this limitation, two methods are available. One is Redundancy Based Technique and the other one is Bite Based Parity Technique. The first one has a significant advantage of correcting any error on definite term over the second one but at the cost of higher level of overhead and hence lowering the processing speed. In this paper we have proposed a new approach based on the Redundancy Based Technique that would certainly speed up the process of reliable encryption and hence the secured communication.

Wireless sensor network (WSN) consists of limited energy resources, which reduce the processing capabilities and a radio frequency communication unit with limited transmission power. In wireless communication, Automatic Repeat request (ARQ) technique are used which has power loss in packet retransmission. Then Error correcting code(ECC) can be used to reduce the number of packet retransmission Turbo codes are error correcting codes with at least two dimensions (i.e. each datum is encoded at least twice).The decoding of turbo codes is based on an iterative procedure using the concept of extrinsic information. Highly parallel decoders for convolution turbo codes have been studied by proposing two parallel decoding architectures and a design approach of parallel interleaves. This paper analysis the parallel concatenation turbo encoder and error correction circuit. It detects the error in a given data, if the data should have error then it intimate the error to the user and recover that error.

2011 IEEE Radio and Wireless Symposium, 2011

In this paper, inspired by network coding theory we propose an efficient hybrid encryption-coding algorithm that requires using traditional encryption only for the first small amount of data. This amount of data, which we refer to as the first block, is determined by the traditional encryption algorithm to be applied on this first block. In our proposed algorithm, all the rest of the information will then be transmitted securely over the wireless channel, using network coding, without a need for using traditional encryption. Unlike the traditional and opportunistic encryption algorithms, the proposed algorithm achieves higher data rates and less avalanche error effect and at the same time it is as secure as traditional encryption algorithms. Assuming the additive white Gaussian noise (AWGN) channel model employing our proposed algorithm we analyze its performance in terms of throughput and security level. Numerical results of different case studies are provided.

Communications on Applied Electronics, 2015

To deal with n numbers of user simultaneously and error free communication with maximum utilization of limited spectrum, BER(bit error rate) improvement is an open challenge for communication engineers. In this paper work is an attempt to implement such an error control code Turbo code in which BER improve by using various efficient encoding and decoding designs. Turbo code provides modest decoding complexity for large block length and better bit error rate as compared to other code. According to [7] RSC encoder provides minimum error probability is implemented. For testing AWGN wireless channel is used. Recursive structure along with BPSK modulation is used. The decoding algorithm such as Viterbi algoritm,MAP(maximum a posterior),BCJR (bahl, cocke, jelinek and raviv)can be used .

international journal of engineering trends and technology, 2014

Turbo code has become the coding technique of choice in many communication and storage systems due to its near Shannon limit error correction capability. With requirement on increasing data rates for deep space mission, it is required to have efficient encoder and decoder. Turbo codes provide up to 0.8 dB improvement in Eb/No over the current best codes used by deep space missions. The total number of decoder iterations depends on the physical channel characteristics. In this paper, we proposed a turbo encoder with the 1/3,1/4,1/6 rate and turbo decoder.