Privacy-Enhancing Group Signcryption Scheme

In the last decades, several signcryption schemes have been developed for different privacy-enhancing purposes. this paper, we propose a new group scheme that provides: unforgeability, confidentiality, ciphertext and sender anonymity, traceability, unlinkability, exculpability, coalition-resistance, unforgeable tracing verification. It is important to notice proposed allows signer anonymously signcrypt message on group’s behalf (i.e., sender’s anonymity). The security analysis of also provided. Our proposal proven be strongly existentially under an adaptive chosen attack, indistinguishable provide anonymity attack. Furthermore, extended work in multi-receiver scenario, where authorized receivers able unsigncrypt ciphertext. experimental results show our efficient even computationally restricted devices can therefore used many IoT applications. Signcrypt protocol smart cards takes less than 1 s (including communication overhead). time Unsigncrypt current ARM negligible (less 40 ms).