A proposed Development of Clock Control Stream Cipher based on Suitable Attack

Sadkhan, Sattar B.

doi:10.1109/it-ela50150.2020.9253074

Cited by 12 publications

(4 citation statements)

References 11 publications

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“…In our scheme, the internal state of the proposed cipher consists of LFSR α , LFSR β , LFSR γ , LFSR a , LFSR b , and LFSR c , and all of these LFSRs are six maximum-length LFSRs of lengths 31, 17, 13, 61, 89, and 107, respectively. The respective periods of LFSR α , LFSR β , LFSR γ , LFSR a , LFSR b , and LFSR c are denoted as P α , P β , P γ , P a , P b , and P c , respectively, and they are equal to 2 31 − 1, 2 17 − 1, 2 13 − 1, 2 61 − 1, 2 89 − 1, and 2 107 − 1, respectively. Notice that all of these periods are prime numbers.…”

Section: Periodmentioning

confidence: 99%

“…To resist this attack and spoil the linearity properties of LFSRs, there are three basic schemes that can be achieved, which include: a nonlinear combining function on the outputs of several LFSRs, a nonlinear filtering function on the contents of a single LFSR, and using the output of one (or more) LFSRs to control the clock of one or more other LFSRs, which are the clock-controlled LFSRs. All of these schemes require a nonlinear function to combine the outputs of LFSRs or control the input clock for clock-controlled LFSRs [10][11][12][13][14]. The clock-controlled based stream cipher A5/1 uses the nonlinear majority function as the nonlinear function to promote its security.…”

Section: Introductionmentioning

confidence: 99%

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A Key-Based Multi-Mode Clock-Controlled Stream Cipher for Real-Time Secure Communications of IoT

2023

Electronics

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With the rapid development of the Internet and wireless communications, as well as the popularization of personal communication systems, the security of real-time communications is demanded. The efficient technology of stream ciphers can satisfy this requirement of security. In this paper, to enhance the security strength of stream ciphers, we design a key-based multi-mode clock-controlled stream cipher for real-time secure communications of the Internet of things (IoT). The proposed stream cipher is equipped with a multi-mode depending on the key. The different working modes are shipped with different encrypting circuits depending on the user’s key. We analyze the period, the linear complexity, and use known attacks to verify the security strength of the proposed cipher. Compared with existing dual mode clock-controlled stream ciphers, the merits of our proposed cipher are its long period, high linear complexity, low hardware complex, low initialization clock, and simplicity in mode switching. Furthermore, the proposed cipher passes the FIPS PUB 140-1 and SP800-22 tests, obtaining at least 97.00%.

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Section: Periodmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Key-Based Multi-Mode Clock-Controlled Stream Cipher for Real-Time Secure Communications of IoT

2023

Electronics

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“…When the gates of the two LFSRs are p, q and gcd(p, q) = 1, the period of the output sequence is (2 p − 1)(2 q − 1). The clock-control generator uses the sequence generated by one LFSR to control the shift of another LFSR [26], with the maximum period being (2 p − 1)(2 q − 1). We show the clock-control generator in the Figure 3.…”

Section: Typical Nonlinear Sequence Generatorsmentioning

confidence: 99%

“…This means that m-sequences with low linear complexity are easy to recover; thus, nonlinear pseudorandom generators have become a new research direction [12][13][14][15]. Some classical nonlinear pseudorandom sequence generators are widely used and studied, such as the Geffe generator [16][17][18][19][20], JK flip-flop [21][22][23] and clock-control generator [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

A Novel Nonlinear Pseudorandom Sequence Generator for the Fractal Function

et al. 2022

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A pseudorandom sequence is a repeatable sequence with random statistical properties that is widely used in communication encryption, authentication and channel coding. The pseudorandom sequence generator based on the linear feedback shift register has the problem of a fixed sequence, which is easily tracked. Existing methods use the secret linear feedback shift register (LFSR) and built-in multiple LFSRs and is difficult to prevent cracking based on the hardware analysis. Since the plaintext depends on a specific language to be generated, using pseudo-random sequence encryption, it faces the problem that the encryptor cannot hide the characteristics of the plaintext data. Fractal functions have the following properties: chaotic, unpredictable and random. We propose a novel pseudorandom sequence generator based on the nonlinear chaotic systems, which is constructed by the fractal function. Furthermore, we design a data processing matrix to hide the data characteristics of the sequence and enhance the randomness. In the experiment, the pseudo-random sequences generator passed 16 rigorous test items from the National Institute of Standards and Technology (NIST), which means that the nonlinear pseudorandom sequence generator for the fractal function is effective and efficient.

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