Tata Soft's headquarters is 50 storeys high, and the critical information department is located on 30 to 50 floors. Elevators above the 30th floor have been closed and fire escapes are guarded by security guards. The company is set up like a brand mobile phone production process. The case of the mobile phone is made in China, the battery of the mobile phone is produced in Vietnam, and the glass of the mobile phone is produced in the Philippines. These are the jobs below the 30th floor. Of course, there is also the business department, the marketing department, and so on. And above 30 floors is a combination of things produced in China, Vietnam, and the Philippines, plus their own secret core settings. Therefore, the highest content of jishu is above 30 layers.

The Trojan that was implanted a few days ago was found to be garbled after downloading. Come back and download the source code...... Yu Ming pondered, this guy wouldn't be a very high-level person, and he didn't know that he would be garbled.

The conference room on the 30th floor became a temporary office space for several people, and a 34-5-year-old woman, director of Tata Software, Jishu, was in charge of the reception. The two sides know each other. Director Jishu's name is An An, who is Li Fu's alumni sister and a female doctor.

Yu Ming first asked: "Who knew that there are security settings in the software, and the downloaded data will be converted into garbled characters?" ”

An An tapped on the computer, and there were twelve people on the big screen who were ticked off the list. Yu Ming said: "Get rid of them." ”

"Okay." An An got rid of the twelve.

Yu Mingdao: "Who knew that the terminal source code was needed to crack the garbled code." ”

An An said: "Garbled is a protective measure. If you can't decode it outside, you will definitely want to decode it in-house. If you can't decode it in the company, you will definitely think of terminals. ”

Yu Mingdao: "That is, everyone knows? ”

"No, in fact, we haven't used this garbled protection method for three years. This is because this saver can cause too much background computing on the computer, and cause the system to slow down or even crash. ”

Yu Ming asked: "Who knew that this kind of garbled code could only be solved through the source code of the terminal?" ”

"I'm not sure." An An said: "There is communication between colleagues. ”

Lix asked, "Yu Ming, weishenme excludes these twelve people. ”

"They know there is a security garbled setting. When planting a Trojan to the terminal, the source code needed to crack it will also be downloaded. Yu Ming said: "But this case happened in two parts. The other party first planted a Trojan horse to download the information, and then took the risk of downloading the source code to crack the garbled code. It means that they don't know that the software has such security settings. ”

Tommy and Lex looked at each other and nodded, which was also the result of their analysis. However, Yu Ming was able to find out about this problem immediately, and they were already very satisfied. Tommy said, "There are seventy more suspects, what do you think?" ”

Phuket said: "To investigate." Inquiries, personal belongings, etc. ”

An An said: "You have the highest authority to talk to any employee at any time. ”

Tommy clapped his hands: "Let's go." ”

……

The terminal is on the forty-fifth floor, and there are two security guards standing at the door. Equipped with an ID lock and eye mask scanning. To get here, you need to swipe two security gates with your ID card.

Mandy asked, "When something happened." Are there two guards here too? ”

"Nope. Forty-five to fifty floors are the absolute core of Tata Software. An An looked at the employees who were still busy working in white on both sides and said: "There are many geniuses among them, and geniuses sometimes have some quirks, you know." The working environment here is transparent, if there are two guards in their line of sight. They will appear uneasy. Therefore, we use the monitoring method plus the jishu means of security door protection. ”

Yu Ming looked at this passage, which was about thirty meters long. On both sides are workshops. Regardless of the location of the person to the terminal hangar. All need to pass through an ID security gate. Also break through the eye mask and ID safety gate. The security gate is glass......

Phuket said: "It's incredible. Even if everyone is a nerd. How dare a criminal suspect take such a big risk to walk through a passage? As soon as someone looked at him, he was exposed. Are you sure this is the only way? ”

"Sure." The accompanying security supervisor replied.

Monnie said, "You can't figure out when the Trojan was planted for the first time, can you?" Will there be a staff on duty at night? ”

An An was a little ashamed: "It doesn't have to be night, our original attitude towards terminal protection is not very correct." At least 10 or more people have been in and out of the terminal hangar, until the Trojan is discovered, and only I can enter. ”

Monnie: "These ten people are ......"

An An said: "It doesn't make sense, our company has a product. Similar to flash memory, it has wireless reception and transmitting functions, the size of a USB flash drive, as long as it is close to the terminal within five meters, someone can physically access the terminal. Remotely the flash memory can be connected to the terminal. ”

"That means anyone can store Shem and plant a Trojan horse on someone who has access to it," said Lex. But after the discovery of the Trojan. The permission to enter the terminal hangar has been cancelled, and only the director of An An remains. But there's still no guards, is there? ”

"Yes, although the Trojan was found, I still believe in the garbled code protection system." An An replied.

Mandy said: "That is to say, after the other party invaded, it was found that the information was garbled. And then just find a way to clone your ID card and eye mask? ”

Lix frowned: "This requires very professional Jishu support." It's not something that can be done by one person. ”

"Ladies and gentlemen." An An said: "I don't care who wants to steal our company's secrets, I only care about the security of the source code." If the source code is leaked, we risk facing a lawsuit that could bankrupt our company. ”

"......" Everyone was silent, and they were right. It's none of their business what gangs are outside to carry out jishu support. They are responsible for catching the suspect and getting the source code back.

Yu Ming asked: "According to the report, someone attacked the surveillance system. Causing the monitoring system to be paralyzed for half an hour. In addition to the surveillance system, what else was attacked? ”

An An replied affirmatively: "No." ”

"That's weird." Yu Ming muttered.

Mandy asked softly, "What did you find?" ”

Yu Mingdao: "I have come up with a way to reach the terminal hangar safely without being discovered by the staff." But the conditions are not true. ”

Mandy was about to ask when a security guard came up and said. The security supervisor said, "Please come with us to the fiftieth floor." ”

Yu Ming asked, "Can I have a chat with the staff?" ”

An An said: "Of course, do you need my company?" You know they're going to have poor communication skills. ”

"I know computers." Yu Ming said: "I'll go to the fiftieth floor to find you in a while." ”

On the table in the conference room on the fiftieth floor, a small mountain was piled up. Xiaoshan is composed of mobile phones, laptops, tablets, PDAs, USB flash drives, flash memory, etc.

An An said: "All the desktops have been inspected, and no source code has been found. These are the personal belongings of all employees. Computers can be retrieved by special software. As for USB flash drives, flash drives, and mobile phones, you may need your help to screen. ”

"We need a profile of our employees," Mandy said. Including having a financial crisis. Marital crisis. A personnel list and a list of employees who have been penalized within three months are also required. Also, there are employees who do a great job, at least he thinks he is good, but don't get a list of employees. ”

An An asked, "Weishenme?" ”

Mandy said: "We discussed earlier that there are at least more than two people in the Jishu team supporting this suspect. Since it is a gang crime, it is very logical. They choose criminal suspects to cooperate with them in committing crimes, and they will definitely not go without investigation. Employees with these records are their preferred target for cooperation. ”

Tommy said: "Mandy is in charge of the personnel investigation, Monnie, you are also a computer science graduate, you and Lix check the USB flash drive and mobile phone." Phuket: You are good at psychoanalysis. Ask someone to ask them where they might be hiding the source code. ”

"Yes, sir." Everyone is getting busy.

……

Does the computer Yu Ming understand? Of course Yu Ming understands, at least he knows how to go online and offline A movies. But this group of creatures is so ferocious that as soon as they open their mouths, Yu Ming, who is not proficient in English technical terms, is dizzy.

"Death Knife." Yu Ming stopped: "I just want to know." Within half an hour of the crash, did any of your other facilities find to have been compromised? ”

A girl with glasses looked at Yu Ming for a while and said, "It depends on the means used by the other party to invade......

Tommy stood behind Yu Ming and said kindly: "You use the simplest words to express your meaning." ”

Yu Ming nodded and asked, "Are you having a power outage?" Then? ”

"Nope." The girl thought about it: "The last power outage happened eight years ago......"

"Got it." Yu Mingdao: "The second question. Is there a power outage in the hallway? ”

The girl thought for a while, went to ask the man with glasses next to her, and then the two of them went to ask others. Yu Ming was speechless.

Tommy asked, "You weishenme ask this question?" ”

"Because there's only one way to get to the terminal hangar through the tunnel without being detected." Yu Ming said: "That is, the studio is brightly lit, and the passage is pitch black. They can't even remember if there was a power outage at that time. ”

Tommy said: "This building is basically computer-controlled, and if the whole building has a power outage, someone will definitely be aware of it." If it's a regional power outage. You've heard Director An Ann say that she's pretty sure no one has hacked into the other systems. But ......"

"But what?"

Tommy said, "What would you do if you were to repair a light bulb in the aisle?" ”

"Turn off the power to the light bulbs." Yu Ming suddenly said: "I understand, important power supply." For example, the working power supply is controlled by a computer. But the lighting power supply is still an ordinary switch. Your sister was frightened by someone's tone. ”

"Huh?" Tommy couldn't understand the second half of the sentence in Chinese.

"It's Falck."

Tommy asks confusedly, "Isn't Falck a ''?" ”

"Tommy, there are hundreds of words that can be translated into Falck. If I were to translate it simply, I was talking about your sisters. But in Chinese, it means swearing. ”

"And what do you call sisters?"

"......" Yu Ming said: "We won't discuss this issue, let's go find the line." ”

As Tommy explains, lights are not purely computer-controlled. The computer can control the area lights off. However, in order to facilitate maintenance in the area, a physical distribution box is also installed. The distribution box on the 45th floor is on the side of the passage, close to the safe passage location. Tommy put on special glasses and nodded: "No fingerprints." You are right. ”

If there is no fingerprint, it means that the other party has wiped the switch.

Tommy asked, "But if someone finds a power outage in the hallway and goes to the distribution box to send the power back, won't the burglar be exposed?" ”

Yu Ming pointed to the empty external wiring and said: "You see that this screw has traces of being twisted, I guess the other party turned off the power first, and then created a short circuit." This way, anyone who sends a power supply will trip immediately. When he was finished, he changed the line back and sent it to the power supply. What is it? Yu Ming looked at the gate knife, and there was a black.

"It's the arc that causes the metal to oxidize." Tommy said, "It seems that our electrician is an amateur. "When there are appliances still working, especially high-power appliances. If the switch is suddenly disconnected, the switch will produce an arc.

He was frightened by the arc and his natural reaction was to quickly take his hand away. But ......" Yu Ming pointed to the left side of the outer frame of the distribution box, where there is a particularly clean position. There was no dust at all. Yu Ming simulated touching the electric switch, and suddenly startled, his hand popped out, and the back of his hand smashed on the outer frame of the distribution box. Yu Ming said: "Maybe our suspect has a wound on the back of his right hand. ”

Tommy picked up the walkie-talkie and called, "Everyone stop working and assemble in the conference room on the fiftieth floor." ”

……

All the personnel waited in the designated rooms on their respective floors, and Yu Ming and Tommy worked together to push open a room. Two security guards followed. Twenty people were standing in the room. Tommy nodded to Ming, and Yu Ming said, "Please stretch out your hands." "Walk up and check them one by one.

"Turn over." Yu Mingdao: "How long have you not washed your hands?" ”

"Turn over." Yu Ming said: "Don't you all wash your hands? ”

"Turn over." Yu Ming said: "Tear off the band-aid." "Look at the wound on the back of the hand, there is a pustule. Yu Ming said: "So I want you to wash your hands." ”

There is no problem with the forty-fifth floor, the forty-sixth floor. Yu Ming continued to check. Walked up to a girl and said, "Turn over." ”

The girl flipped over the back of her hand, and a long mark of blood that had just condensed appeared on her right hand. Yu Ming was stunned for a second, and the girl suddenly put her hand on the desk behind her, and held a paper cutter in her hand. grabbed Yu Ming with one hand, put the paper cutter on Yu Ming's neck and shouted, "Don't come here." ”

Tommy and the two guards immediately put their guns down, and Yu Ming smiled bitterly: "Three people with guns, you let me go to the line of fire?" "Nine times out of ten, Tommy's gun is illegal. Guards are hard to say, because there are special needs in India that can carry guns. Especially such large companies.

"Put down the knife." Tommy shouted. If the other party is also armed with a gun, then it is fine, but the problem is that the other party is holding a knife, a sharp paper cutter. Even if the opponent is killed, and the opponent's body falls, Yu Ming's artery may be cut.

"Ms. Sanmi." The number plate says Sur Sanmi, what is the name of this. Yu Ming said cautiously: "Ms. Sanmi, I have an eighty-year-old mother and a three-year-old child. If you go down with a knife, it will be three lives in one corpse. ”

"I don't care, you let me go." Sanmi cried and shouted.

Sure enough, no matter how miserable other people's families are, it's none of their business. (To be continued......)