{'fraction_non_alphanumeric': 0.030204962243797196, 'fraction_numerical': 0.006472491909385114, 'mean_word_length': 5.105263157894737, '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}}
Full-healing group-key distribution in online social networks

A new type of group key distribution GKD, called 'full-healing' group key distribution F-GKD, is proposed in this paper which helps new-added members to recover the historical session keys. On the basis of the F-GKD scheme, a security approach is proposed for the privacy preservation of online social networks OSNs. Compared with conventional public-key approaches, our approach has the following advantages: 1 only the polynomial interpolation computation is executed in our approach, which is much lighter than modulo exponentiation or pairing operations, 2 1-to-many key distribution is more efficient and scalable than 1-to-1 style in public-key approaches, 3 full-healing property speeds up the historical session recovery HSR, which has the de facto practicability in OSN services. Experiment is also implemented to evaluate the performance of our approach.