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EUROCRYPT
2012
Springer

Detecting Dangerous Queries: A New Approach for Chosen Ciphertext Security

9 years 4 months ago
Detecting Dangerous Queries: A New Approach for Chosen Ciphertext Security
We present a new approach for creating chosen ciphertext secure encryption. The focal point ork is a new abstraction that we call Detectable Chosen Ciphertext Security (DCCA). Intuitively, this notion is meant to capture systems that are not necessarily chosen ciphertext attack (CCA) secure, but where we can detect whether a certain query CT can be useful for decrypting (or distinguishing) a challenge ciphertext CT∗ . We show how to build chosen ciphertext secure systems from DCCA security. We motivate our techniques by describing multiple examples of DCCA systems including creating them from 1-bit CCA secure encryption — capturing the recent Myers-shelat result (FOCS 2009). Our work identifies DCCA as a new target for building CCA secure systems.
Susan Hohenberger, Allison B. Lewko, Brent Waters
Added 29 Sep 2012
Updated 29 Sep 2012
Type Journal
Year 2012
Where EUROCRYPT
Authors Susan Hohenberger, Allison B. Lewko, Brent Waters
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