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<jesseposner>
looking at the NITE protocol (https://github.com/ElementsProject/scriptless-scripts/blob/master/md/NITE.md), why not use the tweaked pay-to-contract key `E_c = E + hash(E, c)G` as the adaptor instead of `t_A*G`? In a dispute, the escrow agent would complete the adaptor signature with the adaptor secret `e + hash(E, c)` (instead of decrypting a ciphertext of the adaptor secret, that would then be used to complete the
<jesseposner>
adaptor signature).
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<waxwing>
nickler, ok it makes sense now, if the attacker constructs s_{1}^{*} = sum_k{s_1^k/b_1^k} + c^{*} a_1 x_1 then the wagner attack shown fits.
<waxwing>
maybe could write that it's specifically s_1^k / b_1^k that's being summed, it wasn't immediately obvious, somehow. maybe just me being dense.
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<jesseposner>
Nadav helped me figure this one out, you can't use `E_c` as the adaptor because the escrow agent's secret `e` will leak when the adaptor signature is completed.
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