IACR News item: 28 October 2013
Xi-Jun Lin, Lin Sun
ePrint Report
In 2012, Alagheband and Aref presented a dynamic and secure key manage
ment model for hierarchical heterogeneous sensor networks. They proposed a signcryption algorithm which is the main building block in their key management model. They proved the algorithm is as strong as the elliptical curve discrete logarithm problem. In this work,
we study the security of their signcryption algorithm. It is regretful that we found their algorithm is insecure. The adversary can impersonate the base station by sending forged messages to the cluster leaders after capturing the signcrypted messages. Hence, the key management model proposed by them is insecure. Then, we propose an improved signcryption algorithm to fix this weakness.
Additional news items may be found on the IACR news page.