<rbrunner7> Info about the proposed treatment of (seed offset) passphrases together with Polyseeds with the upcoming Polyseed support for the Monero core software that may be of wider interest, beyond mere coding: monero-project/monero #10765#issuecomment-4847107785

rbrunner7: In OTS I implemented the seed offset with polyseed in the way that it can be applied on creating or restoring from seed or indices. On the XmrSigner will anyway not be stored any passphrase nor password, but decrypted, and offset on creating or decoding. I agree with you that a password/passphrase should not be stored anywhere.

I have put for OTS the polyseed in external/polyseed as submodule, and I will rebase my code soon on the new master (from 0.18.3.4), polyseed will end up there after your integration?