Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
Ciphertext-Policy Attribute-Based Encryption
SP '07 Proceedings of the 2007 IEEE Symposium on Security and Privacy
Attribute-based encryption with non-monotonic access structures
Proceedings of the 14th ACM conference on Computer and communications security
Attribute-based Signature Scheme
ISA '08 Proceedings of the 2008 International Conference on Information Security and Assurance (isa 2008)
Threshold Attribute-Based Signatures and Their Application to Anonymous Credential Systems
AFRICACRYPT '09 Proceedings of the 2nd International Conference on Cryptology in Africa: Progress in Cryptology
Privacy-Aware Attribute-Based Encryption with User Accountability
ISC '09 Proceedings of the 12th International Conference on Information Security
An Efficient Attribute-Based Ring Signature Scheme
IFCSTA '09 Proceedings of the 2009 International Forum on Computer Science-Technology and Applications - Volume 01
Hidden attribute-based signatures without anonymity revocation
Information Sciences: an International Journal
Attribute-based signature and its applications
ASIACCS '10 Proceedings of the 5th ACM Symposium on Information, Computer and Communications Security
Multi-authority attribute based encryption
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Enhancing Attribute-Based Encryption with Attribute Hierarchy
Mobile Networks and Applications
Securing the Internet of Things
Computer
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
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The Internet of Things (IoT) provides anywhere, anything, anytime connections, for which user privacy is vulnerable and authentication methods that favor policy over attributes are essential. Thus, a signature scheme that considers user privacy and implements an attributes policy is required. Emerging attribute-based signature (ABS) schemes allow a requester of a resource to generate a signature with attributes satisfying the policy without leaking more information. However, few existing approaches simultaneously achieve an expressive policy and security under the standard Diffie-Hellman assumption. Here we describe ePASS, a novel ABS scheme that uses an attribute tree and expresses any policy consisting of AND, OR threshold gates under the computational Diffie-Hellman problem. Users cannot forge signatures with attributes they do not possess, and the signature provides assurance that only a user with appropriate attributes satisfying the policy can endorse the message, resulting in unforgeability. However, legitimate signers remain anonymous and are indistinguishable among all users whose attributes satisfy the policy, which provides attribute privacy for the signer. Compared to existing schemes, our approach delivers enhanced performance by reducing the computational cost and signature size.