Correcting Block Attack on Reduced NEEVA

NEEVA is a hash function algorithm which uses a sponge function as its structure. It is designed for sensor nodes in wireless sensor network (WSN). In this paper, we apply correcting block attack on Reduced NEEVA which is simplification of NEEVA. The result shows that many collision pairs were found in Reduced NEEVA. Based on the analysis, we indicate that the unbalanced Feistel structure give impact on the collision to occur.