An Efficient Multi-server Password Authenticated Key Agreement Scheme Revisited


In 2007, Hu-Niu-Yang put forward an improved efficient password authenticated key agreement scheme for multi-server architecture based on Chang-Lee's scheme proposed in 2004. This scheme is claimed to be more efficient and is able to overcome a few existing deficiencies in Chang-Lee's scheme. However, we find that this scheme is not as ideal as described by… (More)