{'fraction_non_alphanumeric': 0.022031823745410038, 'fraction_numerical': 0.008567931456548347, 'mean_word_length': 4.417218543046357, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Block Cipher Obtained By Blending Modified Feistel Cipher And Advanced Hill Cipher Involving A Pair Of Key Matrices

In this investigation, we have developed a block cipher by blending a modified Feistel cipher and the advanced Hill cipher. In this analysis, we have made use of a pair of involutory matrices, say A and B which include the keys K and L. Here the size of the plaintext is 1024 binary bits and the size of the keys (both put together) is 256 binary bits. The involutory matrices A and B, the modular arithmetic inverse, the XOR operation, and the functions Shift ( ) and Mix ( ) are playing a vital role in strengthening the cipher. The cryptanalysis carried out in this investigation clearly shows that the strength of the cipher is quite considerable, and the cipher cannot be broken by any attack.