Quantum mechanics and its underlying principles assures better security then classical world which are unable to provide unconditional security. A quantum entanglement phenomenon helps us to minimize the required assumptions needs to be made about devices, resulting towards Device Independent Quantum Key Distribution (DIQKD). What about guarantying security of the QKD protocol in case of quantum devices used in protocol are untrusted? DIQKD provides unconditional security without assuming anything about internal working of quantum devices. DIQKD allows users to not focus on integrity of devices being used in protocol. Quantum physical phenomena "non-local correlations" and no information exchange within and between the laboratories of Alice and Bob are bases of DIQKD. As quantum computing started becoming mature and commercially viable, need for quantum error correction became obvious. Quantum error correction can be accommodated in quantum key distribution to gain better efficiency with reference to error rate. Post processing quantum error correcting techniques can remove noise once the procedure is performed. Real time quantum error correction will lead towards large scale quantum computation.