move x1 to range {q/3 , ... , 2q/3} for create_commitments #2
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leontiadZen
suggested changes
Jul 17, 2023
src/party_one.rs
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| while !Self::is_secret_share_in_range(&secret_share) { | ||
| secret_share = ECScalar::new_random(); | ||
| secret_share = ECScalar::from(&secret_share.to_big_int()); |
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Can be done in one line: secret_share = ECScalar::from(&ECScalar::new_random().to_big_int());
src/party_one.rs
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| pub fn get_secret_share_in_range() -> FE { | ||
| let mut secret_share: FE = ECScalar::new_random(); | ||
| secret_share = ECScalar::from(&secret_share.to_big_int()); |
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Can be done in one line: secret_share = ECScalar::from(&ECScalar::new_random().to_big_int());
src/party_one.rs
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| let secret_share: FE = | ||
| ECScalar::from(&secret_share.to_big_int().div_floor(&BigInt::from(3))); | ||
| //in Lindell's protocol range proof works only for x1 \in {q/3 , ... , 2q/3} | ||
| pub fn is_secret_share_in_range(secret_share: &FE) -> bool { |
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can you have a look in sample_range in curv and adapt your code, seems that is what we want
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this change is following the update in Lindell'17 paper in the first message of P1