Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Malicious KGC attacks in certificateless cryptography
ASIACCS '07 Proceedings of the 2nd ACM symposium on Information, computer and communications security
Generic Constructions of Identity-Based and Certificateless KEMs
Journal of Cryptology
A survey of certificateless encryption schemes and security models
International Journal of Information Security
General Certificateless Encryption and Timed-Release Encryption
SCN '08 Proceedings of the 6th international conference on Security and Cryptography for Networks
Simultaneous Hardcore Bits and Cryptography against Memory Attacks
TCC '09 Proceedings of the 6th Theory of Cryptography Conference on Theory of Cryptography
Dual System Encryption: Realizing Fully Secure IBE and HIBE under Simple Assumptions
CRYPTO '09 Proceedings of the 29th Annual International Cryptology Conference on Advances in Cryptology
Certificateless encryption schemes strongly secure in the standard model
PKC'08 Proceedings of the Practice and theory in public key cryptography, 11th international conference on Public key cryptography
Overcoming the Hole in the Bucket: Public-Key Cryptography Resilient to Continual Memory Leakage
FOCS '10 Proceedings of the 2010 IEEE 51st Annual Symposium on Foundations of Computer Science
Achieving leakage resilience through dual system encryption
TCC'11 Proceedings of the 8th conference on Theory of cryptography
New techniques for dual system encryption and fully secure HIBE with short ciphertexts
TCC'10 Proceedings of the 7th international conference on Theory of Cryptography
On constructing certificateless cryptosystems from identity based encryption
PKC'06 Proceedings of the 9th international conference on Theory and Practice of Public-Key Cryptography
Security-Mediated certificateless cryptography
PKC'06 Proceedings of the 9th international conference on Theory and Practice of Public-Key Cryptography
Identity-based encryption resilient to continual auxiliary leakage
EUROCRYPT'12 Proceedings of the 31st Annual international conference on Theory and Applications of Cryptographic Techniques
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In certificateless public key encryption (CL-PKE), the Private Key Generator (PKG) keeps a master secret key to generate a partial private key corresponding to a user's identity. Together with a secret value generated by the user, a full private key can be constructed for decryption. Traditional security model for CL-PKE assumes that (i) both the master secret key of the PKG and the full private key of the user under attack are in absolute secrecy; and (ii) the attacker can only obtain either the target user's secret value without any partial knowledge of the partial private key or vice versa. However, the advancement of practical side-channel attacks enable attackers to obtain partial information of both keys easily, making the above assumption invalid. In this paper, we give the first leakage-resilient CL-PKE. We consider different leakage conditions for Type I (third party attackers) and Type II (honest-but-curious PKG) attackers, following the classification in traditional CL-PKE. We give a concrete construction in the composite order bilinear group. We prove the security of our scheme in the standard model, overcoming some technical difficulties in the security proofs for both Type I and Type II attackers of CL-PKE.