Understanding security failures of two-factor authentication schemes for real-time applications in hierarchical wireless sensor networks
We show various security flaws in two password authentication schemes for HWSN. We put forward three general principles to explicate repeated security failures. Public-key techniques are indispensible to achieve truly two-factor security. We take the first step toward investigating into the rationales of design choices.
hierarchical wireless sensor networks password authentication user anonymity smart card non-tamper resistant