Are entanglement and quantum computer necessary for quantum bit commitment ?

. It was claimed that unconditionally secure quantum bit commitment is impossible due to quantum-computer-assisted-entanglement-attack Recently we have shown that quantum computer-assisted-entanglement-attack can be totally foiled by entanglement and quantum computer. Here we present an alternative un-entanglement based quantum bit commitment scheme. Although the scheme is unconditionally secure but not totally concealing. The scheme demonstrates that unconditional secure scheme may not be totally concealing.