def hashPseudonym(self, i, key, tile):
    digest = hashes.Hash(hashes.SHA256(), default_backend())
    # for i in range (0,len(plainTail)):    # {
    _digest = digest.copy()
    # key = secrets.token_bytes(32)
    _digest.update(bytes(i))
    _digest.update(key)
    _digest.update(bytes(tile))
    p = _digest.finalize()  # }
    # digest.finalize()
    return p