Quantum cryptography seems to be the latest technology that might help in protecting people’s information. The technique depends on Heisenberg’s uncertainty principle, which states that it is impossible to measure at the subatomic level without altering it. So, when a QC system sends a message in 0 and 1 format, and if someone tries to eavesdrop, the message structure changes and the recipient can detect the tampering. The message, which is sent in the form of a photon beam, doesn’t encode the message but only contains the key for the actual message, and the recipient later uses the key, which is shared by the sender to encode the message.
Researchers at an Italian observatory proved that photons can travel great distances through space. Researchers from the National Institute of Standards and Technology demonstrated quantum cryptography using a laser to send the encryption key in a secure way. The next stage of development was spearheaded by the University of Singapore, which demonstrated a system that made use of “entangled” photons. New York- based MagiQ Technologies and the Swiss-based Id Quantique have already started selling QC systems for prices between $125,000 and $175,000. The speed right now may be slow but it could surely be improved, paving the way for one of the most secure ways of sending messages known to modern science.