Had anyone read this paper? Paper Link:
https://eprint.iacr.org/2016/056.pdf In this paper, what script is used to verify the blind sign? I didn't understand.
In the seventh page of this paper, the transaction T
f needs to meet two conditions.
1. T[sub]f[/sub] is signed by I and contains a valid blind signature /theta on sn(overlines), or
2. T[sub]f[/sub] is signed by A and the time window tw has expired.
I know that Condition 2 uses
OP_EQUALVERIFY OP_CHECKSIG and
timelock to achieve.
But how is Condition 1 implemented?
Can someone teach me?