A Novel Turbo-Based Encryption Scheme Using Dynamic Puncture Mechanism

Abstract

This paper proposes a novel encryption method based on Turbo code. In most communication systems, information encryption and error correction are always independent. While joint encryption and error correction codes combine these two processes into one. In order to provide information encryption and error correction simultaneously, we generate a normal random sequence that controls the puncturing mechanism by a secret key in the Turbo encoder. The puncturing mechanism is dynamic and controlled by the secret key. On the other hand, the key-controlled puncturing mechanism deletes the parity bits randomly, which ensures a high error correction capability for the Turbo code. When decoding, only the legal receiver can generate the same normal random sequence using the secret key, then classify and decrypt the received sequence correctly. While for the illegal receivers, because a wrong secret key results in a wrong puncturing mechanism, and the Turbo decoder is sensitive to the puncturing mechanism, they will get a totally wrong decoding result. Meanwhile, this coding scheme also provides good error correction capability for the encrypted information while it is transmitted in a noisy channel. Experimental results show that the proposed method performs well in terms of both security and error-immunity

Joint Encryption and Error Correction Technical Research Applied an Efficient Turbo Code

“…Chaotic sequence{} k s is generated by a key (Logistic mapping initial value), through its binary processing, pseudo-random binary sequence {} k t is generated. Suppose the number of data is i, which the value is "1" in{} k t ;and the number of data is j, which the value is "0" in{} 12 { , , , } j q q q ,at last, the system-bit information sequence whose length is N is obtained.…”

Crypto-Coding as DES-Convolution for Land Mobile Satellite Channel

“…Its strength depends on the constitutive parameters and roughness of the ground. Since this ray normally arrives with a negative elevation, it is not always received by a directional terminal antenna [14].…”

A turbo‐based encryption and coding scheme for multiple‐input multiple‐output orthogonal frequency division multiplexing wireless communication systems affected by Doppler frequency offset

“…In recent years, there have been some investigations that combine encryption and coding to reduce the complexity of the system. One of these methods is based on adjusting the interleaver or the puncturing mechanism of the Turbo code to enhance reliability and security [10][11][12][13][14][15][16][17][18]. In [10], the authors proposed a joint error correction and encryption approach, but this encryption and coding scheme has a low error-correcting capability and is dependent on the hard decision.…”

“…In [10], the authors proposed a joint error correction and encryption approach, but this encryption and coding scheme has a low error-correcting capability and is dependent on the hard decision. The methods proposed in [11,12] were focused on changing the puncturing mechanism, the performances of the system are comparable to the normal Turbo code at the same coding rate, but relying on a static secret key has the disadvantage of allowing illegal users to guess the secret key or even the plaintext.…”