2 releases
0.2.5 |
|
---|---|
0.2.3 |
|
0.1.11 | Apr 28, 2023 |
0.1.10 | Jan 17, 2023 |
0.1.0 |
|
#6 in #jubjub
43 downloads per month
Used in zero-network
12KB
188 lines
ElGamal Encryption
This crate provides additive homomorphic ElGamal encryption over jubjub curve and also supports fully no_std
and parity-scale-codec
.
Scheme
Alice has balance $a$ and public key $b$.
She generates the randomness $r$ and computes encrypted balance $(g^r, g^a * b^r)$.
When Bob transfers $c$ to Alice, he generates the randomness $r'$ and computes encrypted transfer amount $(g^{r'}, g^c * b^{r'})$.
The sum of encrypted balance and transfer amount is folloing.
$$ (g^{r + r'}, g^{a + c} * b^{r + r'}) $$
Dependencies
~4MB
~79K SLoC