SECURITY ENHANCEMENT FOR 3- PEKE PROTOCOL USING PARALLEL MESSAGE TRANSMISSION TECHNIQUE
P. Richard Rajkumar, C. Manoharan, Annai Mathammal · 2012
It is easy to choose and memorize simple and meaningful vocabulary as secret passwords, but it is very hard to meet the requirement of security and efficiency. Hence chang and chang proposed a novel three party encrypted key exchange protocol without using the server’s public keys. The key exchange protocol has achieved great attention due to its simplicity and efficiency. It was claimed that the protocol was practically secure and efficient. On the other hand, the protocol resists all types of password guessing attacks, because the password is of low entropy. It was then Yoon and Yoo who demonstrated the vulnerability of chang and chang’s protocol regarding undetectable on line password guessing attacks. This paper presents an enhanced protocol to eliminate undetectable online password guessing attack proposed by Yoon and Yoo.it also proposed an enhanced protocol which could achieve better performance by requiring only four message transmission round and the performance is analyzed on a set of experiments.