It would be nice to be able to verify that the shares coming back are healthy and valid. To do that with vss, the person verifying the shares would need a copy of the verifcation vector. Who is it safe to give this to? e.g.
it is safe to post the verification vector publicly. The shares in this schemes are essentially private keys and the vv is just an array of corresponding public keys. No information can obtained from them except to verify if a given share is correct.