Scientists from Space Applications Centre (SAC) and Physical Research Laboratory have used quantum entanglement to create a hack-proof communications system. This achievement has put India in the first rank when it comes to developing knowhow about quantum-encryption.
How was it achieved?
- Real-time quantum key distribution (QKD) was used to conduct hack-proof communications between two places separated by 300 metres.
- The experiment was conducted between two buildings at the Space Applications Centre, Ahmedabad.
- Scientists created a channel to share secure text, image transmissions and two-way video calling.
- The experiment was repeated multiple times to ensure the repeatability and robustness of an indigenously developed QKD system capable of seamlessly generating and utilising secure keys for various applications.
What is Quantum cryptography?
- Quantum cryptography, also called quantum encryption, uses quantum physics — the properties of elementary particles — to create a secure communications system.
- Basically, it is a method of encryption that uses the naturally occurring properties of quantum mechanics to secure and transmit data in a way that cannot be hacked.
Differences between Quantum cryptography and Traditional cryptographic
- Quantum cryptography relies on physics, rather than mathematics, as the key aspect of its security model.
- Quantum cryptography is a system that is completely secure against being compromised without the knowledge of the message sender or the receiver.
- Quantum cryptography uses individual particles of light, or photons, to transmit data over fiber optic wire.
- Particles can exist in more than one place or state at a time;
- a quantum property cannot be observed without changing or disturbing it; and
- whole particles cannot be copied.
