How to prove yourself: practical solutions to identification and signature problems
Proceedings on Advances in cryptology---CRYPTO '86
On the (Im)possibility of Obfuscating Programs
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Wallet Databases with Observers
CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
Towards Realizing Random Oracles: Hash Functions That Hide All Partial Information
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
Verifiable encryption of digital signatures and applications
ACM Transactions on Information and System Security (TISSEC)
On obfuscating point functions
Proceedings of the thirty-seventh annual ACM symposium on Theory of computing
Obfuscation for cryptographic purposes
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Securely obfuscating re-encryption
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Obfuscating point functions with multibit output
EUROCRYPT'08 Proceedings of the theory and applications of cryptographic techniques 27th annual international conference on Advances in cryptology
On strong simulation and composable point obfuscation
CRYPTO'10 Proceedings of the 30th annual conference on Advances in cryptology
An ID-Based verifiable encrypted signature scheme based on hess’s scheme
CISC'05 Proceedings of the First SKLOIS conference on Information Security and Cryptology
On symmetric encryption and point obfuscation
TCC'10 Proceedings of the 7th international conference on Theory of Cryptography
Efficient identity-based encryption without random oracles
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Secure obfuscation for encrypted signatures
EUROCRYPT'10 Proceedings of the 29th Annual international conference on Theory and Applications of Cryptographic Techniques
| Hi-index | 0.00 |
Since obfuscation was brought into the field of cryptography, it has become one of the most difficult and hottest problems. Because a general secure obfuscating method, if exists, will lead to the solution of many open problems in cryptography. However, after Bark et al.'s negative impossibility result for general obfuscation became well-known, only a few positive results was brought out. In EUROCRYPT 2010, Hada proposed a secure obfuscator of encrypted signatures (ES), which signs a message under Alice's secret signing key and then encrypts the signature using Bob's public encryption key. This result is the only few secure obfuscation of complicated cryptographic primitives. In this paper, we consider the obfuscation of encrypted verifiable encrypted signatures (EVES). There is a trusted third party (TTP) in our protocol, and EVES first generates a verifiable encrypted signature (VES) under Alice's secret signing key and the TTP's public encryption key and then the VES is encrypted using Bob's public encryption key. We give out the detailed EVES protocol and securely obfuscate it. We prove the security requirement of virtual black box property under standard assumptions and the secure obfuscation result will have many practical applications as we issue.