Hash-ElGamal in Java

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This is a Java implementation of the Hash-ElGamal cryptosystem, which is a partially homomorphic encryption.

It supports adding a mask on the ciphertext.

Reference:

1. B. Chevallier-Mames, P. Paillier, and D. Pointcheval. Encoding-free ElGamal encryption without random oracles. In PKC, 2006.