LI Hui-xian, JU Long-fei. Security Analysis and Improvement of an Anonymous Multi-Receiver Signcryption Scheme[J]. Acta Electronica Sinica, 2015, 43(11): 2187-2193.
LI Hui-xian, JU Long-fei. Security Analysis and Improvement of an Anonymous Multi-Receiver Signcryption Scheme[J]. Acta Electronica Sinica, 2015, 43(11): 2187-2193. DOI: 10.3969/j.issn.0372-2112.2015.11.008.
Pang et al proposed a new multi-receiver ID-based anonymous signcryption scheme by using Lagrange interpolating polynomial.They announced that their scheme makes it impossible for an attacker or any other message receivers to derive the identity of a message receiver such that the privacy of each receiver can be guaranteed.In this work
we studied the security of Pang et al's anonymous multi-receiver signcryption scheme.It is regretful that we found a receiver is not really anonymous to any other receivers in Pang et al's scheme.In order to solve this security defect
an improved scheme was proposed.Finally
the improved scheme was proved to satisfy the correctness and receiver anonymity in the random oracle model.