{'fraction_non_alphanumeric': 0.01834862385321101, 'fraction_numerical': 0.0, 'mean_word_length': 5.55, '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}}
Advanced Framework for Iterative Hash Functions

The well-known Merkle-Damgård construction could not preserve all of the properties of the compression function, such as the second preimage resistance property, pseudo random property etc. To improve the security of the iterative Hash function, an enhanced iterative construction was proposed. Using the known attack methods, the security of the new construction has been considered. The results are that this construction can maintain the collision resistance of the compression function, resist the attacks on the Merkle-Damgård construction including the second preimage attack and the herding attack.