Efficient techniques for realizing geo-spatial access control
ASIACCS '07 Proceedings of the 2nd ACM symposium on Information, computer and communications security
New constructions for provably-secure time-bound hierarchical key assignment schemes
Proceedings of the 12th ACM symposium on Access control models and technologies
A data outsourcing architecture combining cryptography and access control
Proceedings of the 2007 ACM workshop on Computer security architecture
Over-encryption: management of access control evolution on outsourced data
VLDB '07 Proceedings of the 33rd international conference on Very large data bases
Efficient key management for cryptographically enforced access control
Computer Standards & Interfaces
New constructions for provably-secure time-bound hierarchical key assignment schemes
Theoretical Computer Science
Key hierarchies for hierarchical access control in secure group communications
Computer Networks: The International Journal of Computer and Telecommunications Networking
Efficient and secure distribution of massive geo-spatial data
Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Scalable key management algorithms for location-based services
IEEE/ACM Transactions on Networking (TON)
Trade-Offs in Cryptographic Implementations of Temporal Access Control
NordSec '09 Proceedings of the 14th Nordic Conference on Secure IT Systems: Identity and Privacy in the Internet Age
Encryption policies for regulating access to outsourced data
ACM Transactions on Database Systems (TODS)
Data privacy - problems and solutions
ICISS'07 Proceedings of the 3rd international conference on Information systems security
Constructing key assignment schemes from chain partitions
DBSec'10 Proceedings of the 24th annual IFIP WG 11.3 working conference on Data and applications security and privacy
Practical and efficient cryptographic enforcement of interval-based access control policies
ACM Transactions on Information and System Security (TISSEC)
Cryptographic enforcement of role-based access control
FAST'10 Proceedings of the 7th International conference on Formal aspects of security and trust
Efficient provably-secure hierarchical key assignment schemes
Theoretical Computer Science
Provably secure key assignment schemes from factoring
ACISP'11 Proceedings of the 16th Australasian conference on Information security and privacy
A secure and efficient role-based access policy towards cryptographic cloud storage
WAIM'11 Proceedings of the 12th international conference on Web-age information management
Time-storage trade-offs for cryptographically-enforced access control
ESORICS'11 Proceedings of the 16th European conference on Research in computer security
An auto-delegation mechanism for access control systems
STM'10 Proceedings of the 6th international conference on Security and trust management
Detecting flaws in dynamic hierarchical key management schemes using specification animation
ICDCIT'12 Proceedings of the 8th international conference on Distributed Computing and Internet Technology
Efficient provably-secure hierarchical key assignment schemes
MFCS'07 Proceedings of the 32nd international conference on Mathematical Foundations of Computer Science
Incorporating temporal capabilities in existing key management schemes
ESORICS'07 Proceedings of the 12th European conference on Research in Computer Security
Simple, efficient and strongly KI-Secure hierarchical key assignment schemes
CT-RSA'13 Proceedings of the 13th international conference on Topics in Cryptology
A generic algebraic model for the analysis of cryptographic-key assignment schemes
FPS'12 Proceedings of the 5th international conference on Foundations and Practice of Security
Proceedings of the 2013 ACM SIGSAC conference on Computer & communications security
CloudHKA: a cryptographic approach for hierarchical access control in cloud computing
ACNS'13 Proceedings of the 11th international conference on Applied Cryptography and Network Security
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A key assignment scheme is a cryptographic technique for implementing an information flow policy, sometimes known as hierarchical access control. All the research to date on key assignment schemes has focused on particular encryption techniques rather than an analysis of what features are required of such a scheme. To remedy this we propose a family of generic key assignment schemes and compare their respective advantages. We note that every scheme in the literature is simply an instance of one of our generic schemes. We then conduct an analysis of the Akl-Taylor scheme and propose a number of improvements. We also demonstrate that many of the criticisms that have been made of this scheme in respect of key udpates are unfounded. Finally, exploiting the deeper understanding we have acquired of key assignment schemes, we introduce a technique for exploiting the respective advantages of different schemes.