{'fraction_non_alphanumeric': 0.02694610778443114, 'fraction_numerical': 0.0, 'mean_word_length': 5.5588235294117645, '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 construction of attribute-based aggregate signatures

For the identity-based aggregate signatures, Hohenberger, Sahai and Waters proposed the first scheme that admits unrestricted aggregation, using multilinear maps. On the other hand, for the attribute based-signatures, which is an extended notion of the identity-based signatures, the ones with aggregation are not known to exist so far. This paper studies the attribute-based aggregate signatures. We introduce a rigorous definition of the attribute-based aggregate signatures and propose a construction. Our scheme is the first attribute-based aggregate signature although it admits only conjunctive predicates.