Universally Composable Symmetric Encryption

12 years 4 months ago
Universally Composable Symmetric Encryption
For most basic cryptographic tasks, such as public key encryption, digital signatures, authentication, key exchange, and many other more sophisticated tasks, ideal functionalities have been formulated in the simulation-based security approach, along with their realizations. Surprisingly, however, no such functionality exists for symmetric encryption, except for a more abstract DolevYao style functionality. In this paper, we fill this gap. We propose two functionalities for symmetric encryption, an unauthenticated and an authenticated version, and show that they can be implemented based on standard cryptographic assumptions for symmetric encryption schemes, namely IND-CCA security and authenticated encryption, respectively. We also illustrate the usefulness of our functionalities in applications, both in simulation-based and game-based security settings.
Ralf Küsters, Max Tuengerthal
Added 20 May 2010
Updated 20 May 2010
Type Conference
Year 2009
Where CSFW
Authors Ralf Küsters, Max Tuengerthal
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