Adapt replay protocol for malicious security of share-conversion

[th4s]

Modify the current implementation so that each individual OT choice is checked for correctness. Currently only the end result is checked.

Furthermore add a commitment to the sender's rng seed, which is revealed and checked in the end, when the tape is sent.

[heeckhau]

@th4s recorder.rs no longer exists. Can this issue be close?

[th4s]

I would leave this open. The file has been renamed to tape.rs. I looked into it, and it seems that there is still no commitment to the sender's rng seed and only the final field element is checked for correctness.