Digital Signcryption or How to Achieve Cost(Signature & Encryption)
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
A Concrete Security Treatment of Symmetric Encryption
FOCS '97 Proceedings of the 38th Annual Symposium on Foundations of Computer Science
One-pass HMQV and asymmetric key-wrapping
PKC'11 Proceedings of the 14th international conference on Practice and theory in public key cryptography conference on Public key cryptography
A novel framework for protocol analysis
ProvSec'11 Proceedings of the 5th international conference on Provable security
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One of the challenges within public-key based cryptosystems is providing the user with a convenient interface, while retaining security. In the universal composability framework, we propose an ideal functionality for secure messaging, with a user-friendly interface. We also propose an ideal functionality for signcryption, and we show that, given a public key infrastructure and a secure signcryption protocol, we can construct a protocol that securely realizes the secure messaging functionality. Moreover, we show that a signcryption protocol realizes the signcryption functionality if and only if the corresponding signcryption scheme is secure.