TY - JOUR
T1 - Extended dual system group and shorter unbounded hierarchical identity based encryption
AU - Gong, Junqing
AU - Cao, Zhenfu
AU - Tang, Shaohua
AU - Chen, Jie
N1 - Publisher Copyright:
© 2015, Springer Science+Business Media New York.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - This paper continued the research line of dual system groups (DSG) opened by Chen and Wee (CRYPTO, 2013 and IACR Cryptology ePrint Archive, 2014). Motivated by Lewko’s unbounded hierarchical identity based encryptions (HIBE) (EUROCRYPT, 2012), we extended Chen and Wee’s DSG and showed how to construct an unbounded HIBE from our extended DSG. Furthermore, an instantiation of our extended DSG was given using prime-order bilinear groups under the d-Lin assumption. These two results imply an adaptively secure unbounded HIBE in the standard model with not only shorter ciphertexts and user’s secret keys but also faster algorithms than Lewko’s construction.
AB - This paper continued the research line of dual system groups (DSG) opened by Chen and Wee (CRYPTO, 2013 and IACR Cryptology ePrint Archive, 2014). Motivated by Lewko’s unbounded hierarchical identity based encryptions (HIBE) (EUROCRYPT, 2012), we extended Chen and Wee’s DSG and showed how to construct an unbounded HIBE from our extended DSG. Furthermore, an instantiation of our extended DSG was given using prime-order bilinear groups under the d-Lin assumption. These two results imply an adaptively secure unbounded HIBE in the standard model with not only shorter ciphertexts and user’s secret keys but also faster algorithms than Lewko’s construction.
KW - (Hierarchical) Identity based encryption
KW - Dual system group
KW - Public key encryption
KW - Unbounded HIBE
UR - https://www.scopus.com/pages/publications/84937696975
U2 - 10.1007/s10623-015-0117-z
DO - 10.1007/s10623-015-0117-z
M3 - 文章
AN - SCOPUS:84937696975
SN - 0925-1022
VL - 80
SP - 525
EP - 559
JO - Designs, Codes, and Cryptography
JF - Designs, Codes, and Cryptography
IS - 3
ER -