Karsten Nohl

Two Birds with One Stone: Two-Factor Authentication with Security Beyond Conventional Bound

Understanding security failures of two-factor authentication schemes for real-time applications in hierarchical wireless sensor networks

On the anonymity of two-factor authentication schemes for wireless sensor networks: Attacks, principle and solutions

Preserving privacy for free: Efficient and provably secure two-factor authentication scheme with user anonymity

Anonymous Two-Factor Authentication in Distributed Systems: Certain Goals Are Beyond Attainment

Reverse-engineering a cryptographic RFID tag