Identity-Based Encryption from the Weil Pairing
SIAM Journal on Computing
The Oracle Diffie-Hellman Assumptions and an Analysis of DHIES
CT-RSA 2001 Proceedings of the 2001 Conference on Topics in Cryptology: The Cryptographer's Track at RSA
Non-Interactive Zero-Knowledge Proof of Knowledge and Chosen Ciphertext Attack
CRYPTO '91 Proceedings of the 11th Annual International Cryptology Conference on Advances in Cryptology
A Practical Public Key Cryptosystem Provably Secure Against Adaptive Chosen Ciphertext Attack
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
Direct chosen ciphertext security from identity-based techniques
Proceedings of the 12th ACM conference on Computer and communications security
Stateful public-key cryptosystems: how to encrypt with one 160-bit exponentiation
Proceedings of the 13th ACM conference on Computer and communications security
Chosen-Ciphertext Security from Identity-Based Encryption
SIAM Journal on Computing
On the evaluation of powers and related problems
SFCS '76 Proceedings of the 17th Annual Symposium on Foundations of Computer Science
Lower bounds for discrete logarithms and related problems
EUROCRYPT'97 Proceedings of the 16th annual international conference on Theory and application of cryptographic techniques
Efficient pseudorandom generators based on the DDH assumption
PKC'07 Proceedings of the 10th international conference on Practice and theory in public-key cryptography
About the security of ciphers (semantic security and pseudo-random permutations)
SAC'04 Proceedings of the 11th international conference on Selected Areas in Cryptography
On the limitations of the spread of an IBE-to-PKE transformation
PKC'06 Proceedings of the 9th international conference on Theory and Practice of Public-Key Cryptography
Chosen-Ciphertext security from tag-based encryption
TCC'06 Proceedings of the Third conference on Theory of Cryptography
Efficient One-Round Key Exchange in the Standard Model
ACISP '08 Proceedings of the 13th Australasian conference on Information Security and Privacy
Chosen Ciphertext Secure Public Key Encryption with a Simple Structure
IWSEC '08 Proceedings of the 3rd International Workshop on Security: Advances in Information and Computer Security
ASIACRYPT '08 Proceedings of the 14th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
One-round key exchange in the standard model
International Journal of Applied Cryptography
Compact CCA-Secure Encryption for Messages of Arbitrary Length
Irvine Proceedings of the 12th International Conference on Practice and Theory in Public Key Cryptography: PKC '09
Practical Chosen Ciphertext Secure Encryption from Factoring
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
CT-RSA '09 Proceedings of the The Cryptographers' Track at the RSA Conference 2009 on Topics in Cryptology
Efficient Signcryption Key Encapsulation without Random Oracles
Information Security and Cryptology
A New Variant of the Cramer-Shoup KEM Secure against Chosen Ciphertext Attack
ACNS '09 Proceedings of the 7th International Conference on Applied Cryptography and Network Security
The Kurosawa--Desmedt key encapsulation is not chosen-ciphertext secure
Information Processing Letters
Multi-recipient Public-Key Encryption from Simulators in Security Proofs
ACISP '09 Proceedings of the 14th Australasian Conference on Information Security and Privacy
Improved efficiency of Kiltz07-KEM
Information Processing Letters
Efficient Constructions of Signcryption Schemes and Signcryption Composability
INDOCRYPT '09 Proceedings of the 10th International Conference on Cryptology in India: Progress in Cryptology
Secure hybrid encryption from weakened key encapsulation
CRYPTO'07 Proceedings of the 27th annual international cryptology conference on Advances in cryptology
Miniature CCA2 PK encryption: tight security without redundancy
ASIACRYPT'07 Proceedings of the Advances in Crypotology 13th international conference on Theory and application of cryptology and information security
Generic constructions of stateful public key encryption and their applications
ACNS'08 Proceedings of the 6th international conference on Applied cryptography and network security
Efficient chosen-ciphertext security via extractable hash proofs
CRYPTO'10 Proceedings of the 30th annual conference on Advances in cryptology
A generic method for reducing ciphertext length of reproducible KEMs in the RO model
IWSEC'10 Proceedings of the 5th international conference on Advances in information and computer security
Chosen ciphertext secure encryption under factoring assumption revisited
PKC'11 Proceedings of the 14th international conference on Practice and theory in public key cryptography conference on Public key cryptography
Threshold and revocation cryptosystems via extractable hash proofs
EUROCRYPT'11 Proceedings of the 30th Annual international conference on Theory and applications of cryptographic techniques: advances in cryptology
Encryption simulatability reconsidered
ISPEC'11 Proceedings of the 7th international conference on Information security practice and experience
Efficient CCA-secure CDH based KEM balanced between ciphertext and key
ACISP'11 Proceedings of the 16th Australasian conference on Information security and privacy
Acquiring key privacy from data privacy
Inscrypt'10 Proceedings of the 6th international conference on Information security and cryptology
Simple and efficient public-key encryption from computational diffie-hellman in the standard model
PKC'10 Proceedings of the 13th international conference on Practice and Theory in Public Key Cryptography
Public-key encryption with non-interactive opening: new constructions and stronger definitions
AFRICACRYPT'10 Proceedings of the Third international conference on Cryptology in Africa
Efficient CCA-Secure PKE from identity-based techniques
CT-RSA'10 Proceedings of the 2010 international conference on Topics in Cryptology
New chosen ciphertext secure public key encryption in the standard model with public verifiability
ICIC'11 Proceedings of the 7th international conference on Advanced Intelligent Computing Theories and Applications: with aspects of artificial intelligence
On the joint security of encryption and signature, revisited
ASIACRYPT'11 Proceedings of the 17th international conference on The Theory and Application of Cryptology and Information Security
Security and Communication Networks
Improved efficiency of chosen ciphertext secure encryption from factoring
ISPEC'12 Proceedings of the 8th international conference on Information Security Practice and Experience
Strongly secure authenticated key exchange from factoring, codes, and lattices
PKC'12 Proceedings of the 15th international conference on Practice and Theory in Public Key Cryptography
DDH-Like assumptions based on extension rings
PKC'12 Proceedings of the 15th international conference on Practice and Theory in Public Key Cryptography
Identity-based extractable hash proofs and their applications
ACNS'12 Proceedings of the 10th international conference on Applied Cryptography and Network Security
CCA secure IB-KEM from the computational bilinear diffie-hellman assumption in the standard model
ICISC'11 Proceedings of the 14th international conference on Information Security and Cryptology
Publicly verifiable ciphertexts
SCN'12 Proceedings of the 8th international conference on Security and Cryptography for Networks
Improved tradeoff between encapsulation and decapsulation of HK09
Inscrypt'11 Proceedings of the 7th international conference on Information Security and Cryptology
Proxy re-encryption in a stronger security model extended from CT-RSA2012
CT-RSA'13 Proceedings of the 13th international conference on Topics in Cryptology
Proceedings of the first ACM workshop on Asia public-key cryptography
Constructing practical signcryption KEM from standard assumptions without random oracles
ACNS'13 Proceedings of the 11th international conference on Applied Cryptography and Network Security
Publicly verifiable ciphertexts
Journal of Computer Security - Advances in Security for Communication Networks
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We propose a practical key encapsulation mechanism with a simple and intuitive design concept. Security against chosen-ciphertext attacks can be proved in the standard model under a new assumption, the Gap Hashed Diffie-Hellman (GHDH) assumption. The security reduction is tight and simple. Secure key encapsulation, combined with an appropriately secure symmetric encryption scheme, yields a hybrid public-key encryption scheme which is secure against chosen-ciphertext attacks. The implied encryption scheme is very efficient: compared to the previously most efficient scheme by Kurosawa and Desmedt [Crypto 2004] it has 128 bits shorter ciphertexts, between 25-50% shorter public/secret keys, and it is slightly more efficient in terms of encryption/decryption speed. Furthermore, our scheme enjoys (the option of) public verifiability of the ciphertexts and it inherits all practical advantages of secure hybrid encryption.