{'fraction_non_alphanumeric': 0.022458628841607566, 'fraction_numerical': 0.0, 'mean_word_length': 4.801369863013699, '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}}
Enhancement of S-AES using chaos for the support of biomedical applications

The simplified AES (S-AES) algorithm is used in Zigbee and sensor networks as a fast encryption method but it is easy breakable and not secure. Thus it doesn't meet the security requirements of medical applications. On the other hand, ciphers based on chaotic functions seem to be more promising. In this paper, an enhancement of S-AES algorithm is presented. It consists of using a chaotic cipher composed of two maps PWLCMs (Piece Wise Linear Chaotic Map) to improve two functions of S-AES. This enhanced algorithm is particularly adequate for data encryption in ZigBee networks and biomedical sensor networks where robustness and real time are both essential. A comparison between our enhanced algorithm and the original S-AES is presented with regard to robustness.