Scholar’s Advanced Technological System

After coming out of the lab, the ark instructed Academician Xue to wait a moment and then looked at the two security guards standing at the door and said in a serious tone.

“Adjust the level of confidentiality here to level A, unless it's me, no one can come near here. ”

The two guards stood still and landed neatly and lifted their hands for a military ceremony.

“Yes.”

After leaving the Semiconductor Institute, Academician Xue looked at the ark next to him and asked.

“Are they from the army? ”

Ark: “I have a good relationship with their leader, so I helped arrange work. ”

If he comes out of the army, at least he won't have to worry about the political trial, nor will the leader Dai recommend it to him. Moreover, in terms of security capabilities, those who came out of the army were far better than those who had been recruited in the usual way, and even basic training could be omitted and they could take up their posts directly.

From its inception to the present, the Jinling Institute of Higher Studies, not to mention criminal cases such as theft of materials, has not lost a single piece of paper, relying on these dedicated and lovely people.

He came to the office with Reverend Xue, and Ark told the secretary to pour him a cup of tea and pour himself a cup of coffee.

After doing these things, the secretary left the office intrigued and took the door with him.

Looking at the door closed, the ark continued to look at the old gentleman sitting opposite him and smiled and said.

“I guess you have a lot to ask, you go ahead. ”

Academician Xue was silent for a while and sighed softly.

“I did have a lot of confusion before I came here, but now… I feel I've got the answer. Besides…"

The old academician's smile brings a slightly sophisticated feeling.

“… cryptography, you can quit the stage of history now. ”

The ark shook its head.

“This statement is so absolute that any technological upgrading takes time, even with fusion energy as clean and efficient as this, coal and electricity still have a small share of the market in our greater western region...”

“Besides, the only thing that exits the historical stage is the use of encryption algorithms in long-distance communication. Cryptography can still play a significant role in short-distance communication from the base station to the individual, as well as in other areas…”

After a pause, the ark looked at Reverend Xue and continued.

“… and all that is needed is some adjustments. ”

Repeatedly chewing on the ark, Xue Yard fell into contemplation.

Without disturbing his thinking, the ark lifted a coffee cup, blew the white mist and took a sip.

After about five minutes, Reverend Xue finally raised his head and said seriously.

“Is there anything I can do to help? ”

A praiseworthy smile appeared on the face of the ark.

“Of course.”

“I have a few questions and need to consult with experts in the relevant fields. ”

Reverend Xue: “In what way? ”

“About quantum communication. ”

After hearing this, Dr. Xue was slightly stunned and said with a slight embarrassment: “Quantum communication this… I am not an expert in this area, you should find a professor at the University of Science...”

“Long before you came here, I had sent an e-mail to the professor at the university, and after hearing my questions, they recommended you to me. ”

Looking at Academician Xue, Ark continued, "In addition to cryptography, you yourself are an expert in communications engineering, have served as a senior engineer at China Electronics 46, and have been involved in the construction of early optical fiber networks in China. ”

When he heard these memorable things, a few memories appeared in the eyes of Reverend Xue.

Eventually, however, he shook his head.

“Those are old days, and I've basically moved into communications security since 10 years, and I'm afraid it's hard to help. ”

“But I believe that experience cannot be obsolete," the Ark said earnestly, "especially when we need to re-establish this communications network. ”

At the moment of hearing this phrase, Mr. Xue shook his mind and looked at the ark incredibly.

“What do you mean, are you going to use... quantum optical fiber? Re-establishing domestic communication networks? ”

“That's not my plan. ”

Watching as the voice had begun to speak incessantly, the Ark laughed slightly and continued in a joking tone.

“Besides, I never said it was just domestic. ”

……

Once the problem of quantum repeaters has been resolved, the entire quantum communication technology has the potential to be commercialized.

However, quantum communication technology has a very fatal disadvantage in terms of the amount of data transmitted over time.

In the case of submarine optical cables from the west coast of the United States to the east coast of China, for example, the bandwidth is based on TBPS.

Data of this magnitude is not difficult for traditional optical fibers, but it is a problem that cannot be solved in the short term for quantum communication technologies that rely on single-photon entanglement to deliver information.

Simply put, with quantum technology-based communication channels, meeting data exchange between a limited number of enterprises is not a problem, but it simply cannot support communications of the scale of the Internet.

However, this is not an unresolved solution.

According to the ISTFP5 report, a 128-bit key ensures the security of 100Gbit data. Theoretically, a quantum communication channel with a bandwidth of up to the MTPS scale would suffice to lock all information across the Pacific Ocean.

Thus, a perfect solution would be to combine traditional means of communication with quantum communication technologies, send “locked” messages using traditional communication channels, and then distribute "unlocked” keys using quantum communication channels.

The abstract description is that the big hand delivers the package and the small hand delivers the key.

This encryption, which is similar to “one-size-fits-all" encryption, is also theoretically capable of achieving “unconditional security”. If the unlocked key is unique, no matter how fast the computer, it is not possible to steal the key by simply operating power.

In order to achieve the separation of keys and encrypted information, a new set of communication protocols is required. More than that, in order to improve the efficiency of the transmission of information, the quantum communication network used to allocate keys must be carefully designed.

It must be acknowledged that this is not an easy task.

But anyway, it's much easier than a quantum repeater.

Almost without hesitation, Academician Xue took the invitation of the Ark on the spot and participated in the project to build a quantum communications network, staying with Jinling University in the name of visiting exchanges.

Exactly, he was still worried about avoiding his colleagues and old friends who were waiting for him to go to the Ministry of Industry and Information Technology.

It's easy to keep his mouth shut, but the industry he's in is too small.

A lot of things, even if he doesn't say anything, one eye and everyone else guesses everything.

Whether it's for the big picture or for himself, leaving for a while is the best option...

With the admission of Academician Xue, the speed of the entire quantum communication network project can be described as divine speed. With the experience of this old man, the Ark quickly found an optimized way to combine quantum and traditional communications technologies and completed a structural framework for this new communications agreement.

So, the day passed and it finally reached the last day of April.

An experimental quantum communication pipeline about 500 metres long was constructed in the hidden corner of the Jinling Institute of Higher Studies. At the same time, this ivory tower, which stands at the top of the Chinese academic community, also welcomes a special guest...