update key_exchange.md

remove the link to a paper
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dan
2025-06-13 09:34:05 +00:00
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@@ -30,7 +30,7 @@ in such a way that
1. Neither party learns the other party's $x$ value
2. Neither party learns $x_r$, only their respective shares of $x_r$.
We will use two maliciously secure protocols described on p.25 in the paper [Efficient Secure Two-Party Exponentiation](https://www.cs.umd.edu/~fenghao/paper/modexp.pdf):
We will use two share conversion protocols:
- `A2M` protocol, which converts additive shares into multiplicative shares, i.e. given shares `a` and `b` such that `a + b = c`, it converts them into shares `d` and `e` such that `d * e = c`
- `M2A` protocol, which converts multiplicative shares into additive shares