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We present the first CCA-secure public-key encryption scheme based on DDH where the security loss is independent of the number of challenge ciphertexts and the number of decryption queries. Our cons...
To gain strong confidence in the security of a public-key scheme, it is most desirable for the security proof to feature a tight reduction between the adversary and the algorithm solving the underlyi...
Lattice-based encryption schemes still suffer from a low message throughput per ciphertext. This is mainly due to the fact that the underlying schemes do not tap the full potentials of LWE. Many cons...
While CCA secure encryption schemes that provide ciphertext indistinguishability offer strongest form of message secrecy, the integrity of the ciphertext is often overlooked.
In this paper we present the first public key encryption scheme that is structure preserving, i.e., our encryption scheme uses only algebraic operations.
In this paper we present the first public key encryption scheme that is structure preserving, i.e., our encryption scheme uses only algebraic operations. In particular it does not use hash-functions o...

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