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EUROCRYPT
2007
Springer
15 years 3 months ago
Zero Knowledge and Soundness Are Symmetric
We give a complexity-theoretic characterization of the class of problems in NP having zero-knowledge argument systems. This characterization is symmetric in its treatment of the ze...
Shien Jin Ong, Salil P. Vadhan
EUROCRYPT
2007
Springer
15 years 3 months ago
Conditional Computational Entropy, or Toward Separating Pseudoentropy from Compressibility
We study conditional computational entropy: the amount of randomness a distribution appears to have to a computationally bounded observer who is given some correlated information....
Chun-Yuan Hsiao, Chi-Jen Lu, Leonid Reyzin
EUROCRYPT
2007
Springer
15 years 3 months ago
Simulatable Adaptive Oblivious Transfer
We study an adaptive variant of oblivious transfer in which a sender has N messages, of which a receiver can adaptively choose to receive k one-after-the-other, in such a way that ...
Jan Camenisch, Gregory Neven, Abhi Shelat
FC
2007
Springer
141views Cryptology» more  FC 2007»
15 years 3 months ago
The Unbearable Lightness of PIN Cracking
Responding to the PIN cracking attacks from Berkman and Ostrovsky (FC 2007), we outline a simple solution called salted-PIN. A randomly generated salt value of adequate length (e.g...
Omer Berkman, Odelia Moshe Ostrovsky
FC
2007
Springer
118views Cryptology» more  FC 2007»
15 years 3 months ago
K-Anonymous Multi-party Secret Handshakes
Abstract. Anonymity-protection techniques are crucial for various commercial and financial transactions, where participants are worried about their privacy. On the other hand, aut...
Shouhuai Xu, Moti Yung