Certifying Quantum Entanglement: A step towards Quantum Security
Nearly hundred years after its discovery, quantum mechanics has reached an important threshold. Today, the laws of quantum physics play an essential role in safeguarding our ability to communicate securely. All communication activities ranging from financial transactions, data exchange and online education to personal emails, all would be untrustworthy in the absence of guaranteed protection from hackers and fraudsters. During the last two decades, it has been realized that two inherent properties possessed by fundamental particles such as photons, can indeed guarantee the privacy of communication using such information carriers. The application of quantum principles in storage, transfer and manipulation of information using these two properties, viz., superposition and entanglement, has opened up a whole new branch of physics called Quantum Information Science.