When Sun Tao thought about it, he couldn't help but feel embarrassed. Experts are experts, and they hit the nail on the head.

The effect of password confidentiality is indeed good, but any technology depends on a certain basis. One of the basis for cryptography is the cryptographic book. At least one of the cryptographic books requires both parties to have the same text material in their hands, so that encryption and decryption can be accurate. If possible, it is best to obtain this material easily, without fear of being lost and omitted, and it cannot attract others' attention.

Is this requirement high? In an era when printing is prevalent and books are rampant, this problem is not a problem at all. But in an era when books are hand-copying, this is exactly the biggest problem.

Thanks to his blessing, woodblock printing has appeared in advance, and the same text materials are no longer a problem. However, most woodblock printing currently prints small articles with a few thousand words. The text volume is insufficient, and many words may not be found, and it is not suitable for codebooks. The only major part is "Salt and Iron Theory of Salt and Iron", but this book is not a common book. Except for those who are interested in governing the people, most people are not interested, and they are far less spread than Cai Yan's "The Talk of the World of the Tao".

Many things are like this. They look very simple, but they are not the case in doing it. Take movable type printing for example. China invented printing, but China's printing has always been mainly woodblock printing. It has developed movable type printing, but it has not become popular. The movable type printing technology is really shining because it uses pinyin characters in the West. It seems very regrettable, but in fact, it is not suitable for movable type printing very simple. The number of Chinese characters required is too amazing, far less than the economy of woodblock printing.

Sun Ce knew about the relevant situation in his previous life, so when he was promoting woodblock printing in Wujun, he did not mention movable type printing. Now he wants to make a cryptobook, this problem suddenly became prominent.

"What Fengxiao said is very true." Sun Ce also hesitated. "Can you find the applicable text?"

"It was difficult at first, but there happened to be a book that was very suitable and it was just printed. The general made this suggestion at this time, and it was a natural result."

"What book?"

"Xu Shuzhong's thirty volumes of "Shuwen Jiezi" were printed just a few days ago. After the war ended, they can be sent to various places for sale." Guo Jia laughed loudly, very happy. "More than 10,000 words, you can use them all in one place, without any omissions. You can search for words by page, which is convenient and fast. If you think the whole set of books is too heavy, just bring a single volume of words."

Sun Ce was relieved. This is indeed a good choice, with enough text volume and no attention. After this book was written, someone had copied it, but copying it is inevitable to make mistakes. Now there are carefully proofread printed copies, which should be very popular. Everyone who reads the books will be handed in a book, who would have thought that this is a password book?

"Okay, you are an expert, so I'll leave this matter to you." Sun Ce thought for a while and said, "It's better for the general to make two groups of punishment, one to find a way to encrypt, and the other to decrypt and tentative attacks. Although there is no password that cannot be solved, it's always good to reduce some obvious loopholes."

“That’s right.”

After discussing the matter of confidentiality, the two immediately turned the topic back to the current situation. Han Dang brought a new news that they had previously uncertain. Shen Pei led 30,000 Jizhou soldiers to the vicinity of Guandu, and he should participate in the battle. Yuan Shao had more than 20,000 people, including six or seven thousand cavalry composed of Wuhuan and Xianbei people, and infantry composed of the powerful families in northern Jizhou. Unlike the families in southern Jizhou with strong economic strength and equipment advantages, Hu and Han lived in the north of Jizhou, some of them were even barbarians, and now they often went out to the frontier to do business. The people's customs are strong, they can be in and cavalry, and have strong combat power. In addition, Yuan Shao not only has a clear advantage in military strength, but also has relatively complete military branches.

Of course, there is another thing that cannot be ignored. This is a powerful tool to break the infantry formation.

"The three times the advantage of military strength is also led by Yuan Shao, so it should not be underestimated." Guo Jia shook his feather fan and said quietly, "Yuan Shao can fight to the death when he is desperate. My uncle and Ju Su are rare counselors, especially Ju Su, who are great talents. At the moment of life and death, if these people can leave a rift and work together, they may not be able to die and live."

Sun Ce noticed that Guo Jia did not interrogate the companion. "What about the companion?"

"Shenfei." Guo Jia smiled. "He should be the biggest flaw among these people."

“Why?”

"He is too autocratic and has a strong rural concept. He is determined to let the people of Jizhou monopolize the power. Most of the dispute between the Ruying faction and the Jizhou faction was caused by him. Hebei people have this nature, and the misfortune of Empress Guo and Prince Liu Qiang came from this. In his eyes, not only did the people of Ruying be under the roof, but they were not good at plotting with others, but even the people of northern Jizhou are inevitably vulgar and do not deserve to join the people of southern Jizhou. Don't forget that Tian Feng is still in Yecheng. If Shenfu is said to be unwilling to be rude."

Sun Ce supported his chin, gently stroked the beard on his lips with his fingers, recalling the relevant records, and suddenly had an enlightenment. According to historical records, Shen Pei should have participated in the Battle of Guandu, but the role he played in the Battle of Guandu was not clearly stated. Thinking of the powerful crossbow soldiers in Jizhou under Shen Pei, and then the Yuan army shot arrows in the Wanglou during the battle of Yuan Cao, suppressing Cao's army, and finally being defeated by the Thunder Cart, these powerful crossbow soldiers should be Shen Pei's subordinates. There are other historical records that Shen Pei once led the powerful crossbow soldiers in Jizhou to defeat Cao Cao, but he refused to surrender to Cao Cao until his death, so his record of the Battle of Guandu was intentionally or unintentionally erased.

"Since Sewei is a flaw, how can we take advantage of this flaw?"

Guo Jia pondered and thought for a while, and he stood up. "This is a big deal, I want to think about it first. General, since Junyi is safe and the general of the chariot and cavalry are safe, we don't have to rush to achieve success. You can wait patiently for the fighter. Planting rice is over, and at most half a month, we can recruit military troops to help."

"What should I do if Xun Yan?"

"These 20,000 people are the foundation for his survival. He will not take the initiative to attack unless he is absolutely certain." Guo Jia laughed, feeling indescribable. "The biggest problem of a scholar leading a army is not that he is not planning, but that he is too planning to make decisions. Yuan Shao and Xun Yan are the same. So we should not be anxious, give them time to suspicion. Suspicion is like weeds, which can never be eradicated. As long as there is a little chance, it will be everywhere in the mountains and fields, and it is hard to guard against it."

Sun Ce looked at Guo Jia and laughed silently. He understood Guo Jia's unfulfilled intentions. People's hearts are separated from their belly, and no one can be unprepared for another person. This is determined by human nature and cannot be transferred by human will. This is like this. Yuan Shao's subordinates are like this, and his subordinates are like this. However, many of his subordinates have low backgrounds and do not have much desires. Unlike Shen Pei and Xun Yan, they either have a big family and a big career or have a big reputation, and their goals are naturally lofty. However, people's ambitions always grow slowly with their strength. When they have strength, they are afraid that they will do more than Shen Pei and Xun Yan.

"Wenxiao, Shigong Tai said it well. The world is bustling and profit. The world is bustling and everything goes for profit. Trust is because of common interests and goals, and suspicion is nothing more than conflicts of interest. What we need to do now is to find a goal that will allow more people to work together, rather than just focus on the interests in front of us. The task is heavy and the way is long, so we should encourage us with Fengxiao."

Guo Jia looked at Sun Ce in surprise, and after a moment, he chuckled. "The general is well-versed, and he is a true national sage."

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Chapter completed!