Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
An Identity Based Encryption Scheme Based on Quadratic Residues
Proceedings of the 8th IMA International Conference on Cryptography and Coding
Space-Efficient Identity Based EncryptionWithout Pairings
FOCS '07 Proceedings of the 48th Annual IEEE Symposium on Foundations of Computer Science
A tapestry of identity-based encryption: practical frameworks compared
International Journal of Applied Cryptography
Identity-Based Online/Offline Encryption
Financial Cryptography and Data Security
An Efficient Identity-Based Online/Offline Encryption Scheme
ACNS '09 Proceedings of the 7th International Conference on Applied Cryptography and Network Security
Practical ID-based encryption for wireless sensor network
ASIACCS '10 Proceedings of the 5th ACM Symposium on Information, Computer and Communications Security
IWSEC'07 Proceedings of the Security 2nd international conference on Advances in information and computer security
Identity-based online/offline key encapsulation and encryption
Proceedings of the 6th ACM Symposium on Information, Computer and Communications Security
Practical identity-based encryption without random oracles
EUROCRYPT'06 Proceedings of the 24th annual international conference on The Theory and Applications of Cryptographic Techniques
Secure delegation of elliptic-curve pairing
CARDIS'10 Proceedings of the 9th IFIP WG 8.8/11.2 international conference on Smart Card Research and Advanced Application
Publicly verifiable ciphertexts
SCN'12 Proceedings of the 8th international conference on Security and Cryptography for Networks
Server-aided identity-based anonymous broadcast encryption
International Journal of Security and Networks
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Identity-Based Cryptosystem plays an important role in the modern cryptography world, due to the elimination of the costly certificate. However, all practical identity-based encryption schemes require pairing operation in the decryption stage. Pairing is a heavy mathematical algorithm, especially for resource-constrained devices such as smart cards or wireless sensors. In other words, decryption can hardly be done in these devices if identity-based cryptosystem is employed.We solve this problem by proposing a new notion called Identity-Based Server-Aided Decryption. It is similar to normal identity-based encryption scheme, but it further enables the receiver to decrypt the ciphertext without needing to compute pairing with the assistance of an external server. Secure mechanisms are provided to detect whether the server has computed correctly and prevent the server from getting any information about the plaintext or the user secret key. We give two concrete instantiations of this notion.