TY - GEN
T1 - An efficient KP-ABE with short ciphertexts in prime order groups under standard assumption
AU - Kim, Jongkil
AU - Susilo, Willy
AU - Guo, Fuchun
AU - Au, Man Ho
AU - Nepal, Surya
N1 - Publisher Copyright:
© 2017 ACM.
PY - 2017/4/2
Y1 - 2017/4/2
N2 - We introduce an efficient Key-Policy Attribute-Based Encryption (KP-ABE) scheme in prime order groups. Our scheme is semi-adaptively secure under the decisional linear assumption and supports a large universe of attributes and multi-use of attributes. Those properties are critical for real applications of KP-ABE schemes since they enable an efficient and exible access control. Prior to our work, existing KP-ABE schemes with short ciphertexts were in composite order groups or utilized either Dual Pairing Vector Spaces (DPVS) or Dual System Groups (DSG) in prime order groups. However, those techniques brought an efficiency loss. In this work, we utilize a nested dual system encryp- tion which is a variant of Waters' dual system encryption (Crypto' 09) to achieve semi-adaptively secure KP-ABE. As a result, we obtain a new scheme having better efficiency compared to existing schemes while it keeps a semi-adaptive security under the standard assumption. We implement our scheme and compare its efficiency with the previous best work.
AB - We introduce an efficient Key-Policy Attribute-Based Encryption (KP-ABE) scheme in prime order groups. Our scheme is semi-adaptively secure under the decisional linear assumption and supports a large universe of attributes and multi-use of attributes. Those properties are critical for real applications of KP-ABE schemes since they enable an efficient and exible access control. Prior to our work, existing KP-ABE schemes with short ciphertexts were in composite order groups or utilized either Dual Pairing Vector Spaces (DPVS) or Dual System Groups (DSG) in prime order groups. However, those techniques brought an efficiency loss. In this work, we utilize a nested dual system encryp- tion which is a variant of Waters' dual system encryption (Crypto' 09) to achieve semi-adaptively secure KP-ABE. As a result, we obtain a new scheme having better efficiency compared to existing schemes while it keeps a semi-adaptive security under the standard assumption. We implement our scheme and compare its efficiency with the previous best work.
KW - Attribute based encryption
KW - Dual system encryption
KW - Prime order groups
KW - Short ciphertexts
KW - Standard assumption
UR - http://www.scopus.com/inward/record.url?scp=85022083802&partnerID=8YFLogxK
U2 - 10.1145/3052973.3053003
DO - 10.1145/3052973.3053003
M3 - Conference contribution
AN - SCOPUS:85022083802
T3 - ASIA CCS 2017 - Proceedings of the 2017 ACM Asia Conference on Computer and Communications Security
SP - 823
EP - 834
BT - ASIA CCS 2017 - Proceedings of the 2017 ACM Asia Conference on Computer and Communications Security
PB - Association for Computing Machinery, Inc
T2 - 2017 ACM Asia Conference on Computer and Communications Security, ASIA CCS 2017
Y2 - 2 April 2017 through 6 April 2017
ER -