Efficient verifiable encryption (and fair exchange) of digital signatures
CCS '99 Proceedings of the 6th ACM conference on Computer and communications security
Verifiable encryption of digital signatures and applications
ACM Transactions on Information and System Security (TISSEC)
Aggregate and verifiably encrypted signatures from bilinear maps
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
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
Verifiably encrypted signature scheme without random oracles
ICDCIT'05 Proceedings of the Second international conference on Distributed Computing and Internet Technology
Identity-Based Verifiably Encrypted Signatures without Random Oracles
ProvSec '09 Proceedings of the 3rd International Conference on Provable Security
A novel verifiably encrypted signature scheme without random oracle
ISPEC'07 Proceedings of the 3rd international conference on Information security practice and experience
An efficient ID-based verifiably encrypted signature scheme based on Hess's scheme
ISPEC'07 Proceedings of the 3rd international conference on Information security practice and experience
Efficient CDH-based verifiably encrypted signatures with optimal bandwidth in the standard model
ADHOC-NOW'11 Proceedings of the 10th international conference on Ad-hoc, mobile, and wireless networks
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A verifiably encrypted signature can convince the verifier that a given cipher-text is the encryption of a signature on a given message. It is often used as a building block to construct optimistic fair exchange. Recently, Gu et.al gave an ID-based verifiably encrypted signature scheme and claimed that their scheme was secure in random oracle model. Unfortunately, in this works, we show that their scheme is insecure. And we can mount to universal forgery attack in their model. In other words, any one is able to forge a verifiably encrypted signature on arbitrary message m. Subsequently, a novel verifiably encrypted signature scheme (VES) is proposed and the scheme is proven secure in random oracle model. Moreover, the size of verifiably encrypted signature in our scheme is shorter than that of Gu et.al’s signature.