Quantum encryption is a dream for security because with the help of this you can’t even inspect the data without altering it. Currently, it’s several times slower than the conventional kind, which makes it impractical for voice calls or streaming video. Science may have come to the rescue and find a solution for tech-problems, researchers have created a quantum encryption key distribution system that promises to be five to 10 times faster than existing methods, or roughly on par with conventional encryption when run parallel. The basic trick behind this is to cram more data into each photon.
Generally, a person can only encode one bit per photon by using a weak laser. The team further discovered that it could only encode two bits by tweaking the release time of photons and using high-speed photon detectors to track these changes. Effectively, they’re giving photons properties they couldn’t have before.
There is a lot of theoretical work left before this becomes practical, not the least of which is the size: a transmitter/receiver combo would be about as large as a computer. It’s more realistic than you might think. All the parts beyond the single-photon detector are readily available and it could even be used for “free space” transmissions. Eventually, there may be a time when you can have a secure voice chat knowing that even the most determined spy couldn’t listen in and that day will be one of the most successful day of technology.