"Is that him?"


    Sun Cheng''s smile stagnated and his eyes twinkled.


    He knows the owner of the voice, and he is also very familiar. He is one of his roommates in College for several years. His name is Liu Kun.


    If Liu Kun had come to see him in his bedroom a few days ago, he would have been happy to see him.


    But now!


    He took out the USB flash drive from his pocket and played it gently in his hand. For a moment, he just got up and walked towards the door, "here comes..."


    With a greeting, sun Cheng rubbed his stiff face muscles. After brewing for a moment and filling his face with smiles again, he opened the door of the bedroom.


    The next moment, a young man wearing a casual long shirt with a seven point head appeared in front of sun Cheng. It was his former roommate Liu Kun.


    "Ah Cheng, what''s the matter? I haven''t responded to your call. My mobile phone is in arrears and has stopped working?"


    Liu Kun came in with a bag of fruit and skillfully put things on a blank computer table next to sun Cheng. Then he looked at him and asked with concern.


    "Don''t mention it. I was in a bad mood last night. I drank some wine and dropped my mobile phone!" he casually made up an excuse, and sun Cheng pretended to be annoyed.


    His apple 5 is still in a different world, so he doesn''t worry about being torn down at all.


    The bedroom was filled with a lingering smell of wine. Liu Kun followed the smell. Sure enough, he saw that there were several cheap Su wine bottles in a trash can next to him. He didn''t seem to doubt it. Instead, he persuaded him with a warm voice: "you, don''t drink sultry wine if you''re in a bad mood. As long as a phone call, can I not come out with the boss and the fourth?"


    This familiar warm dialogue made sun Chengxin jump out of a burst of guilt.


    "I should have thought more." he comforted himself so much, but he didn''t dare to look at his friends who had known him for several years. Even when he looked at them inadvertently, he had an impulse to turn around and avoid them.


    At that moment, sun Cheng took the opportunity to ask him to come in and sit down. Sun Cheng also began to doubt whether he was too mean because he was a Trojan horse.


    With some guilt, sun Cheng was busy pouring water for him and moving the bench for him. Liu Kun felt uncomfortable with his enthusiasm. After sitting down, he said, "you guy, why are you polite to me? This is your bedroom, isn''t it my bedroom?"


    "Haven''t you all moved out? If you come back now, you''ll be half a guest!"


    "It''s not that we didn''t ask you to move out together. The boss and the fourth didn''t make trouble with you because of borrowing money. It''s not that you always feel sorry!" Liu Kun said: "how? Move in together. After all, it''s more convenient to live outside because we''re going to graduate in two or three months."


    After saying that, he seemed to inadvertently glance at Sun Cheng''s computer screen, and suddenly his face changed slightly, "did you change the system?"


    Sun Cheng nodded. He was still guilty. Seeing the change on Liu Kun''s face, he couldn''t help wondering, "it''s just another system. How''s his reaction so big? Is it really like what I guessed? The Trojan horse came from his hand?"


    At that moment, he said quietly, "before that, my computer crashed frequently. I didn''t repair it in the store and couldn''t reinstall the system. I found a good technician in the Department two days ago. I asked him to look at it and said that there was a Trojan horse in the computer and helped me rebuild the system, which was finally good!"


    When referring to the words "reinstall system" and "Trojan horse", sun Cheng, who had paid special attention to the changes in the expression on his face, sensitively caught a trace of unnaturalness. His heart sank. He suddenly realized that his previous guess might not be delusional. His roommate was very problematic.


    Maybe there was a ghost in his heart. Liu Kun just sat down and left on the pretext that there would be something else.


    As soon as he walked here, sun Cheng, who was more suspicious, could not sit still. Now he couldn''t wait to know the truth.


    After thinking for a while, sun Cheng thought of where to start and continue to track down.


    Unfortunately, he didn''t bring his mobile phone back from the other world, which made him very uncomfortable when he was used to the convenience of mobile phone.


    Fortunately, sun Cheng thought for a while and soon remembered that someone he wanted to contact liked playing games.


    Now he sat back in front of the computer again. Sun Cheng took some time to find a game voice software that had been opened with each other during the game, download it and install it into the computer.


    Then he entered his own account, logged on and searched for a while. Sure enough, he was a little relieved when he found the other party''s account in the friends list.


    Seeing that the other party was actually online, sun Cheng quickly opened the dialog box and contacted him in text: "old four, come back to me as soon as you see it. There''s something for you!"


    After clicking OK to send the conversation, he waited for four or five minutes and didn''t see the other party''s reply. He suddenly understood that the other party might still be in the game.


    I had to narrow it down to the lower right corner of the computer and wait for the other party to find it.


    Because he didn''t know how long to wait, sun Cheng quickly moved his eyes away from the lower right corner of the screen and reopened the browser.


    Tracking down the Trojan horse that inexplicably appeared in his computer is just to solve some confusion in sun Cheng''s heart.


    The most urgent thing for him at present is to raise money as soon as possible and solve a pile of debt problems caused by his previous entrepreneurship.


    For sun Cheng, although it is troublesome, it is not possible at all.


    In fact, after an attempt in the afternoon, he determined that his current computer technology was very high, sun Cheng had actually found a solution.


    He quickly searched an IOS communication community. Sun Cheng searched carefully for a while. Finally, he found the latest version of IOS installation package in a post. He chose to download it.


    One of the ways he thought of to make 100000 yuan quickly is to find bugs for Apple''s IOS system to get paid.


    In September 2015, zerodium, a vulnerability acquisition platform, issued a wanted notice on the IOS 9 system bug, spending $3 million to reward the development of a browser based IOS 9 system for a perfect prison break.


    This reward, which was once noisy last year, actually ended at the end of October last year. On November 3, zerodium announced that one of the hacker teams had successfully created a browser based ios9.19.2 system jailbreak, thus winning a reward of $1 million.


    However, although the reward offered last year has ended, this does not mean that sun Cheng can''t make money from it.


    Because it is obvious that the prison break system offered by zerodium will not be sold to apple in the end.


    As the most popular mobile phone brand in the world, some people are willing to pay a lot of money to get more system bugs about Apple mobile phones.


    Unfortunately, sun Cheng really knows a lot.


    IOS system is not perfect, which is a kind of consciousness he has long had after using apple mobile phone for several years.


    However, what really made him feel disillusioned was that a few days ago, when he was in a different world, he was left at a scrap Station on the outskirts of Washington by a roadblock to see Starscream. When he used the enhancement function of "confusion" to strengthen his apple 5, sun Cheng at that time also took advantage of the powerful intrusion ability of the [spy template] to completely crack every line of code of the IOS system, From this, he found at least hundreds of loopholes.


    Fortunately, when sun Cheng returned to reality from a different world, although he lost his powerful invasion ability of "confusion", all his memories of those loopholes are still there. Even under the influence of "confusion", his computer level has increased by leaps and bounds.


    Therefore, what he needs to do now is to download the latest version of IOS system from the Internet, verify whether the vulnerabilities he found have been repaired one by one, and then consider whether to sell them to zerodium or directly to apple.


    The network speed in the bedroom is not fast. The 1.4g installation package has been downloaded for 20 minutes, and the progress bar has not been completed yet. Sun Chengpo is a little helpless.


    He was bored. Suddenly, the computer in front of him sent out a burst of "didi" prompt sound. Sun Cheng subconsciously looked at the lower right corner and saw that the voice chat software was beating.


    I quickly opened it and saw a group of replies, "I didn''t respond when I called you. Why did your mobile phone turn off? What can I do for you?"


    "Come to master Wang and stir fry. Talk to the place. Don''t tell the boss and the second brother. You''ll come alone!"


    The chat software was silent for a long time before he resumed: "I know. I''ll be there in half an hour!"