Abstract

In realizing the time variant key or variable key from session to session is the key challenge in achieving perfect security. Automatic variable key (AVK) is a novel approach to realise time variant key. In AVK, key is generated for use between the sender and the receiver by using a simple computation technique. The AVK was widely experimented by other researchers that established the superiority of AVK over a single/fixed key. In this paper we propose two new techniques for generating time variant key. Our techniques ensure better randomness among the successive two keys so generated.

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