TY - GEN
T1 - Revocable group signature schemes with constant costs for signing and verifying
AU - Nakanishi, Toru
AU - Fujii, Hiroki
AU - Hira, Yuta
AU - Funabiki, Nobuo
PY - 2009
Y1 - 2009
N2 - Lots of revocable group signature schemes have been proposed so far. In one type of revocable schemes, signing and/or verifying algorithms have O(N)or O(R) complexity, where N is the group size and R is the number of revoked members. On the other hand, in Camenisch- Lysyanskaya scheme and the followers, signing and verifying algorithms have O(1) complexity. However, before signing, updates of the secret key are required. The complexity is O(R) in the worst case. In this paper, we propose a revocable scheme with signing and verifying of O(1) complexity, where no updates of secret key are required. The compensation is the long public key of O(N). In addition, we extend it to the scheme with 0(v'A)-size public key, where signing and verifying have constant extra costs.
AB - Lots of revocable group signature schemes have been proposed so far. In one type of revocable schemes, signing and/or verifying algorithms have O(N)or O(R) complexity, where N is the group size and R is the number of revoked members. On the other hand, in Camenisch- Lysyanskaya scheme and the followers, signing and verifying algorithms have O(1) complexity. However, before signing, updates of the secret key are required. The complexity is O(R) in the worst case. In this paper, we propose a revocable scheme with signing and verifying of O(1) complexity, where no updates of secret key are required. The compensation is the long public key of O(N). In addition, we extend it to the scheme with 0(v'A)-size public key, where signing and verifying have constant extra costs.
UR - http://www.scopus.com/inward/record.url?scp=67049119911&partnerID=8YFLogxK
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U2 - 10.1007/978-3-642-00468-1_26
DO - 10.1007/978-3-642-00468-1_26
M3 - Conference contribution
AN - SCOPUS:67049119911
SN - 3642004679
SN - 9783642004674
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 463
EP - 480
BT - Public Key Cryptography - PKC 2009 - 12th International Conference on Practice and Theory in Public Key Cryptography, Proceedings
PB - Springer Verlag
T2 - 12th International Conference on Practice and Theory in Public Key Cryptography, PKC 2009
Y2 - 18 March 2009 through 20 March 2009
ER -