Even when they stay Agent of insolvency Listen Quantum Encrypted Communication from the door!

Due to the slowness of the current quantum cipher method, it is incompatible with existing communication systems. But with a new discovery of what scientists do, it is at this point that it can come from its superiority.
Quantum cryptography has great advantages in terms of security in the theoretical sense, because it becomes impossible to examine the data without changing the password. However, it becomes unusable for voice or video calls because it is several times slower than existing communication systems. At this point science can work in the hands of researchers: researchers have developed a cryptographic key delivery system that is 5-10 times faster than current methods. In other words, it is a transmission system that can work with conventional encryption systems. Each photon can be obtained by uploading more data.

Normally you can code a data bit per photo with a weak laser. The research team discovered that charging two-bit photons could be accomplished using high-speed photon detectors to manipulate photon emission times and track changes.

There is much to be done to put this method into practice. The transceiver combination can be a computer-sized one. All parts except the single photon detector are easily available and can be used for air communication. As a result, you can have a secure voice chat that even the hysterical agent can not hear.