Modern Cryptography

Abstract

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Enhancing the Security of Vigenere and Polybius Hybrid Cryptography System using Modified Linear Congruential Generation Algorithm

“…Diffusion is the property of the cryptographic algorithm which defines that multiple characters of the cipher text are changed if one character changes in the plaintext. It achieves through the permutation process [18]. As we have seen in Table 7 the comparison of the existing hybrid algorithm and the proposed algorithm using the same plain text.…”

“…Frequency analysis is one method to evaluate whether the cipher text is exposed to attack or not due to how often the characters or symbols appear in the cipher text [18]. If the frequency occurrence of a character is high, the cipher text can be easily broken by cryptanalysis attacks.…”

Security Analysis of Lightweight Cryptographic Algorithms

“…When using IoT devices, conventional cryptographic methods such as the symmetric cryptographic algorithm AES, hashing functions like SHA-256, MD5, as well as other cryptographic security methods such as RSA or ECC (Elliptic Curve Cryptography), do not perform optimally on systems with limited computational power and memory capacity because they occupy too much physical space and processor power, consequently consuming too much power, which is unacceptable for devices with limited capabilities [1], [2]. One of the biggest security threats associated with IoT devices is that even the simplest data collection devices (sensors and measuring modules) can be vulnerable to cyberattacks.…”

Best practices and current implementation of emerging smartphone-based (bio)sensors – Part 1: Data handling and ethics

“…1e5 MB/photo, or 100e600 MB/min of video e depending on the data format and applied quality configuration), analyze (over 1 GHz in clock rate e the running frequency of the CPU [27]), and store (8e512 GB) or transfer (up to approx. 100 megabites per second (MbPS) for 4G mobile networks [28]) large quantities of raw information [29] and to securely transmit the interpreted results to relevant authenticated parties by network encryption protocols [30]. Yet, the complexities associated with SbS data handling related to data collection, processing, interpretation, and storage/ persistence, are rarely reported in the literature.…”