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corrected a typo in the definition of homomorphism in the history paragraph |
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<math>H : V \longrightarrow G</math> such that:
* <math>H</math> is [[Collision resistance|collision resistant]] – it is hard to find <math>x</math> and <math>y</math> such that <math>H(x)</math> = <math>H(y)</math>;
* <math>H</math> is a [[homomorphism]] – <math>H(x</math> + <math>y</math>) = <math>H(x) + H(y)</math>.
Then server can securely distribute <math>H(v_i)</math> to each receiver, and to check if
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