Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Fast Digital Identity Revocation (Extended Abstract)
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
Efficient revocation and threshold pairing based cryptosystems
Proceedings of the twenty-second annual symposium on Principles of distributed computing
Efficient Certificate Revocation
Efficient Certificate Revocation
Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
Secure attribute-based systems
Proceedings of the 13th ACM conference on Computer and communications security
A method for fast revocation of public key certificates and security capabilities
SSYM'01 Proceedings of the 10th conference on USENIX Security Symposium - Volume 10
Certificate revocation and certificate update
SSYM'98 Proceedings of the 7th conference on USENIX Security Symposium - Volume 7
Chosen-Ciphertext Security from Identity-Based Encryption
SIAM Journal on Computing
Identity-based encryption with efficient revocation
Proceedings of the 15th ACM conference on Computer and communications security
A forward-secure public-key encryption scheme
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Certificate-based encryption and the certificate revocation problem
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Reducing trust in the PKG in identity based cryptosystems
CRYPTO'07 Proceedings of the 27th annual international cryptology conference on Advances in cryptology
Certificate revocation using fine grained certificate space partitioning
FC'07/USEC'07 Proceedings of the 11th International Conference on Financial cryptography and 1st International conference on Usable Security
Identity-Based hierarchical strongly key-insulated encryption and its application
ASIACRYPT'05 Proceedings of the 11th international conference on Theory and Application of Cryptology and Information Security
Applying fujisaki-okamoto to identity-based encryption
AAECC'06 Proceedings of the 16th international conference on Applied Algebra, Algebraic Algorithms and Error-Correcting Codes
Efficient Selective Identity-Based Encryption Without Random Oracles
Journal of Cryptology
Efficient identity-based encryption without random oracles
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
ACISP'06 Proceedings of the 11th Australasian conference on Information Security and Privacy
Identity-based encryption with efficient revocation
Proceedings of the 15th ACM conference on Computer and communications security
Removing Escrow from Identity-Based Encryption
Irvine Proceedings of the 12th International Conference on Practice and Theory in Public Key Cryptography: PKC '09
Adaptive-ID Secure Revocable Identity-Based Encryption
CT-RSA '09 Proceedings of the The Cryptographers' Track at the RSA Conference 2009 on Topics in Cryptology
Conjunctive Broadcast and Attribute-Based Encryption
Pairing '09 Proceedings of the 3rd International Conference Palo Alto on Pairing-Based Cryptography
Attribute-Based Encryption Supporting Direct/Indirect Revocation Modes
Cryptography and Coding '09 Proceedings of the 12th IMA International Conference on Cryptography and Coding
Mediated Ciphertext-Policy Attribute-Based Encryption and Its Application
Information Security Applications
Attribute based data sharing with attribute revocation
ASIACCS '10 Proceedings of the 5th ACM Symposium on Information, Computer and Communications Security
Attribute-Based Messaging: Access Control and Confidentiality
ACM Transactions on Information and System Security (TISSEC)
Key updating technique in identity-based encryption
Information Sciences: an International Journal
How to design space efficient revocable IBE from non-monotonic ABE
Proceedings of the 6th ACM Symposium on Information, Computer and Communications Security
EASiER: encryption-based access control in social networks with efficient revocation
Proceedings of the 6th ACM Symposium on Information, Computer and Communications Security
Functional encryption: definitions and challenges
TCC'11 Proceedings of the 8th conference on Theory of cryptography
Securing electronic medical records using attribute-based encryption on mobile devices
Proceedings of the 1st ACM workshop on Security and privacy in smartphones and mobile devices
Towards attribute revocation in key-policy attribute based encryption
CANS'11 Proceedings of the 10th international conference on Cryptology and Network Security
On black-box reductions between predicate encryption schemes
TCC'12 Proceedings of the 9th international conference on Theory of Cryptography
Fine-grained user access control in ciphertext-policy attribute-based encryption
Security and Communication Networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Fully private revocable predicate encryption
ACISP'12 Proceedings of the 17th Australasian conference on Information Security and Privacy
Revocable identity-based encryption from lattices
ACISP'12 Proceedings of the 17th Australasian conference on Information Security and Privacy
Efficient delegation of key generation and revocation functionalities in identity-based encryption
CT-RSA'13 Proceedings of the 13th international conference on Topics in Cryptology
New ciphertext-policy attribute-based access control with efficient revocation
ICT-EurAsia'13 Proceedings of the 2013 international conference on Information and Communication Technology
International Journal of Security and Networks
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
Secure Data Retrieval for Decentralized Disruption-Tolerant Military Networks
IEEE/ACM Transactions on Networking (TON)
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Identity-based encryption (IBE) is an exciting alternative to public-key encryption, as IBE eliminates the need for a Public Key Infrastructure (PKI). The senders using an IBE do not need to look up the public keys and the corresponding certificates of the receivers, the identities (e.g. emails or IP addresses) of the latter are sufficient to encrypt. Any setting, PKI- or identity-based, must provide a means to revoke users from the system. Efficient revocation is a well-studied problem in the traditional PKI setting. However in the setting of IBE, there has been little work on studying the revocation mechanisms. The most practical solution requires the senders to also use time periods when encrypting, and all the receivers (regardless of whether their keys have been compromised or not) to update their private keys regularly by contacting the trusted authority. We note that this solution does not scale well -- as the number of users increases, the work on key updates becomes a bottleneck. We propose an IBE scheme that significantly improves key-update efficiency on the side of the trusted party (from linear to logarithmic in the number of users), while staying efficient for the users. Our scheme builds on the ideas of the Fuzzy IBE primitive and binary tree data structure, and is provably secure.