There was a section of IBM's quantum computing challenge that had you encrypt/decrypt logical qbits by transforming their phase state to a known degree. If the

There was a section of IBM's quantum computing challenge that had you encrypt/decrypt logical qbits by transforming their phase state to a known degree. If the state was altered in-transit, than the inverse transform will not cancel out correctly. the challenge also mentioned that for it to work in practice, the qbits themselves would have to be transported somehow.