A Multi-Recipient Tree-Based Signcryption Scheme

Achieving both message confidentiality and authenticity at a reasonable computational cost, especially in case of using smart cards with limited processing capabilities, has always been considered a challenging problem. signcryption is one attractive cryptographic solution. An even more challenging problem is that of achieving both goals in multi-cast operations. This paper presents a new tree-based, multi-recipient identity-based signcryption scheme. Performance issues are addressed and possible applications of the proposed scheme are suggested.