Towards Key-Dependent Message Security in the Standard Model

  title={Towards Key-Dependent Message Security in the Standard Model},
  author={Dennis Hofheinz and Dominique Unruh},
  journal={IACR Cryptology ePrint Archive},
Standard security notions for encryption schemes do not guarantee any security if the encrypted messages depend on the secret key. Yet it is exactly the stronger notion of security in the presence of key-dependent messages (KDM security) that is required in a number of applications: most prominently, KDM security plays an important role in analyzing cryptographic multi-party protocols in a formal calculus. But although often assumed, the mere existence of KDM secure schemes is an open problem… CONTINUE READING
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