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
Secure Integration of Asymmetric and Symmetric Encryption Schemes
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
ASIACCS '07 Proceedings of the 2nd ACM symposium on Information, computer and communications security
Malicious KGC attacks in certificateless cryptography
ASIACCS '07 Proceedings of the 2nd ACM symposium on Information, computer and communications security
Certificate-Based Signature Schemes without Pairings or Random Oracles
ISC '08 Proceedings of the 11th international conference on Information Security
Certificate based (linkable) ring signature
ISPEC'07 Proceedings of the 3rd international conference on Information security practice and experience
Certificate-based encryption and the certificate revocation problem
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
EuroPKI 2006 Proceedings of the Third European conference on Public Key Infrastructure: theory and Practice
CBE from CL-PKE: a generic construction and efficient schemes
PKC'05 Proceedings of the 8th international conference on Theory and Practice in Public Key Cryptography
Improved efficiency for CCA-secure cryptosystems built using identity-based encryption
CT-RSA'05 Proceedings of the 2005 international conference on Topics in Cryptology
Chosen-ciphertext security of multiple encryption
TCC'05 Proceedings of the Second international conference on Theory of Cryptography
Practical identity-based encryption without random oracles
EUROCRYPT'06 Proceedings of the 24th annual international conference on The Theory and Applications of Cryptographic Techniques
Certificate-based signature: security model and efficient construction
EuroPKI'07 Proceedings of the 4th European conference on Public Key Infrastructure: theory and practice
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In this paper, we propose a new Certificate-Based Encryption (CBE) scheme which is fully secure in the standard model. We achieve chosen ciphertext (CCA) security directly without any transformation. When compared to all previous generic constructions (in either random oracle or standard model), our scheme is far more efficient than those schemes. When compared to the CBE scheme in [16] (which is the only concrete implementation secure in the standard model), we enjoy a great improvement in terms of space efficiency. Their scheme requires more than 160 group elements for the public parameters in order to gain an acceptable security. Our scheme just requires 5 group elements. In addition, the message space of our scheme is almost double as the one in [16]. A larger message space implies that it requires a smaller number of encryption operations of the same plaintext, resulting in a smaller overall ciphertext and overhead as well.