{'fraction_non_alphanumeric': 0.025714285714285714, 'fraction_numerical': 0.0, 'mean_word_length': 5.043103448275862, '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}}
Pairing-free certificateless signature with revocation

How to revoke a user is an important problem in public key cryptosystems. Free of key escrow and costly certificate management, the certificateless public key cryptosystem (CLPKC) is advantageous over both the identity-based public key system and the traditional public key system . However, there are few solutions to the revocation problem in CLPKC. In this paper, we present an efficient revocable certificateless signature scheme. This new scheme can revoke a user with high efficiency. We also give a method to improve the scheme to be signing-key-exposure-resilient. Based on the discrete logarithm problem, our scheme is provably secure.