Chapter 215 App Market

In Dongyuan Restaurant, three men and one woman sat at a table in the corner.

At this time, Wu Bin already knew that the senior named Mao Rui in front of him was a programmer studying in graduate school, and that senior Qin was here to listen.

After getting to know each other, Mao Rui first looked at Wu Bin and said, "Let me get straight to the point. I saw the cheating program you changed. It was very thoughtful and powerful, so I wanted to come out with you to discuss a few issues. No. Excuse me?"

Wu Bin waved his hand: "There's nothing to disturb. Senior, I'm serious."

"You don't need to call me senior, just call me Mao Rui."

Seeing Wu Bin nod, Mao Rui continued: "You should be familiar with the cracked version in the app market, right?"

"Well, not unfamiliar."

"Actually, the two things work in the same principle. These cracked apps are made by third-party developers who back-translate the original apps, add or delete certain functions, and finally recompile and package them into new apps and release them to the app market. middle."

Wu Bin thought for a while and nodded to express his understanding.

"This problem has always been a long-standing problem in the app market. Of course, most people like to be able to play good games for free, but in fact, how can these third parties who repackage apps be good people? These people have been It’s okay to make some money by advertising, but it’s gotten worse recently.”

Mao Rui said and clapped his fingers, "How about inserting a malicious program into it to steal users' privacy, tamper with the links inside to defraud traffic, or lure users to visit malicious websites? What..."

"But the most important thing is that it affects the interests of the genuine app, right?" Wu Bin suddenly interrupted.

"Hahaha, it seems that I am a cheerful person. Yes, if it does not affect the legitimate interests, who will care about the life and death of users, then I will not promote Weiguangzheng to you, let's talk about something practical."

Qin Simeng, who was drinking a drink at the side, almost choked. This was too vernacular...

Li Yan looked at the two of them with interest and seemed to be very interested in this topic.

After taking a sip of iced black tea, Mao Rui patted the table and said, "To control this phenomenon, manual review is of course unreliable. I have to praise Apple here. The ecosystem they have established is really awesome, but Android There is no such thing as this, so there is related research on automatic repackaging detection, which is the direction I am working on now."

"Outsourcing?" Wu Bin knew that Mao Rui was still in graduate school, so it was definitely not his job.

"Tsk, don't look down on outsourcing. Once it's done, you'll get a lot of money in your account."

Wu Bin shook his head: "Oh, I didn't mean to look down on you, I just asked casually."

Without paying too much attention to Wu Bin's statement, Mao Rui continued: "My idea is that if the application market can throw all the apks in the market into one tool, then the tool can automatically recruit those repackaged applications. Isn’t it beautiful?”

After listening to this, Wu Bin couldn't help but said: "This has to solve how to give the app a mark, or a "birthmark", right? As long as the repackaged files have the same birthmark, they can be distinguished from those apps without birthmarks. coming."

"Professional!" Mao Rui gave Wu Bin a thumbs up, "That's why I found you. In your modeling, I saw this possibility and found that you are definitely a talent!"

"Don't dare to take it seriously."

"Don't be humble if you don't dare to act like someone else." After finishing speaking, Mao Rui took out his laptop from the bag he was carrying, opened a file and showed Wu Bin a directed graph.

"Look, the current application uses the interface as a node. When the interface jumps, a directed graph will be built for the edge. The label on the edge is the event that triggers this edge. The running process of this graph is It can be used as the app’s birthmark.”

Then seeing Wu Bin who was about to ask, Mao Rui said first: "The problem now is that this 'birthmark' is not perfect. There are still repackaged applications that have escaped various detections. By the way, many application markets are almost There is no review mechanism.”

"That's why all the genuine ones starved to death." Wu Bin spread his hands.

"Oh, so our generation of programmers has a long way to go." Sighing, Mao Rui continued to open a file and said: "These days, in the coding world, there is a high level of knowledge and a high level of magic. By scanning binary codes It has become more and more difficult to check and package. There are a lot of garbage control flows, reflections, and magically modified bytecodes. Can you feel it?"

"Yeah." Wu Bin nodded.

While the two were chatting heatedly, Li Yan noticed that Qin Simeng, who was sitting opposite him, seemed to be listening very seriously. However, he soon discovered that this seriousness did not seem to be directed at the topic Wu Bin and Mao Rui were talking about, but rather Targeting Wu Bin.

‘If this was the second dimension, this sister Qin Xue would probably have love in her eyes. ’

"Alas...he is such a poor man again."

Li Yan, who has been with Wu Bin for so long, naturally understands how miserable it is for a girl to become interested in Wu Bin...

The last entire afternoon was spent in discussion between the two, and Mao Rui's affirmation of Wu Bin was getting higher and higher.

"I'm going to get some food. Do you want to bring one for you?" Li Yan, who had been listening all afternoon, was not as focused as the two people in front of him because he could not participate in the discussion.

"Wow, it's already time." Mao Rui looked at his phone and exclaimed, "Let's eat first."

Wu Bin also nodded and followed Li Yan to get food.

While queuing up, Mao Rui asked Wu Bin: "Since you are not from the Institute of Letters, so you learned all this by yourself?"

"Well, I'm interested in programming languages."

This sentence made Li Yan, who was behind them, burst into sweat. He suddenly remembered that when he was participating in the competition, Wu Bin suddenly asked him if he knew anything about programming languages. That is to say, he had just become interested in programming languages ​​a year ago.

However, it has only been so long, and even the big names in the Faculty of Science and Technology of the University of Science and Technology of China are convinced of him.

"Let me tell you, with your brain, if you study systematically, you will become a market tycoon in minutes. I really am not bragging. The programming world is in great need of talents like you now."

"Thank you, senior, for your affirmation, but I haven't thought about crossing over into other fields yet. For now, I still prefer physics."

"Oh, yes, I forgot. You are capable of publishing "Science Advances" in the physics world. You are so awesome. I have seen so many geniuses at HKUST, but I have never seen anyone as awesome as you."

"Yes, I haven't seen it either." At this moment, Qin Simeng from behind suddenly interjected.

After hearing this, Mao Rui glanced at Qin Simeng: "You can indeed learn more from him in the future. I guarantee that at his current level, if he teamed up with people from your college to go to C4, he would definitely be at the top level. .”

"Yeah...I heard it." Qin Simeng nodded, then looked at Wu Bin and said, "If I don't understand anything in the future, please feel free to teach Wu Xueba."