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Park Chang-hyuk has a limited stock of Chinese, and he can't understand the phrase "I'll top your lungs", and he guessed that it is not a good word, so he joked with a smile: "I don't need to explain, I know everything, when will I bring your girlfriend to meet?"

If you want to say that Kwon Yoo-ri is a girlfriend or a girlfriend, the problem is that he and Kwon Yoo-ri are only an imaginary couple for a month, and it is impossible for Lee Kai-vin to bring Kwon Yoo-ri over because of Park Chang-hyuk's words, and the relationship between him and Kwon Yoo-ri is more like an emotional contract that will be terminated at that time.

The ending has already been written, and they just enjoy the process.

Of course, Li Kaiwen would not admit it, and turned his head sideways and pretended to be asleep.

Park Chang-hyuk didn't ask two questions, so he was bored and continued to play his League of Legends.

Li Kaiwen fell asleep in a daze on the bed, I don't know how long I slept and felt that I was sore, more painful than just coming out of the yoga studio, I struggled to support my body to get up, and staggered into the bathroom to take a shower to relax.

Park Chang-hyuk snored like thunder, and Li Kaiwen was used to it.

After making sure that his teammates were asleep, Li Kaiwen wiped his dry hair, started his notebook, and sat upright at his desk to prepare for work.

After nearly a week of trying to find loopholes in the system by targeting large American companies, Lee changed his mind and planned to start with large Korean companies.

Globally, the United States is undoubtedly the largest country on the Internet, with the most servers and IP addresses in the world, and its network security protection is also the highest in the world, followed by China and the European Union, such as South Korea and Japan.

Kevin Lee has always targeted well-defended U.S. military networks or large organizations, such as the North American Air Defense and Space Defense Command, the National Security Agency, the Central Intelligence Agency, or key targets such as The New York Times and Citibank.

The networks of South Korea and Japan are not in the eyes of Kaiwen Li at all, and his attempt to invade the networks of Japan and South Korea is like a leisurely stroll and effortless.

Take Sony, Japan's most prestigious behemoth, for example, as its decentralized organizational structure, which means that the cybersecurity of one department is improved, but the security risks of other departments may not be eliminated.

For the top hackers, just one vulnerability is enough, and Sony's loose organizational structure is like a dustpan that leaks everywhere, full of vulnerabilities.

It would be easier for Kevin Lee to invade Sony than it would be to take a taxi to the Han River at 12 a.m.

If Li Kaiwen usually disdains to invade the corporate networks of Japan and South Korea, because it is not challenging, he is not for profit, and there is no sense of accomplishment if the invasion is successful.

Now is different from the past, the purpose of Li Kaiwen's invasion now is to get money, the more the better.

South Korea is a country with a high level of Internet penetration, with more than 87 percent of the country's population having Internet users by 2013, which means that hackers can kill a very large area. At the same time, hacking in South Korea is already commonplace.

In 2008, 10.81 million users of eBay's South Korean subsidiary, the shopping site Aution, were stolen, in 2010, Shinsegae Department Store was hacked and lost the number of 20 million users, and in 2011, HyundaiCapital, a credit card and finance company, was hacked The information of 1.8 million users was lost, and the state-funded commercial bank Nonghyup was hacked, and the system was paralyzed.

If Sony's cyber security is like a leaky dustpan, South Korea's commercial banks and social networks are a miserable mess.

Mr. Lee's preferred target was the Korea Agricultural Cooperative Bank because it was big enough. The bank, known as the largest bank in South Korea, is one of the four largest banks in South Korea and is owned by the Korea Agricultural Association. Nonghyup Bank has about 35 million customers and about 5,000 branches, making it the largest banking network in Korea.

The reason why Li Kaiwen chose the Korea Nonghyup Bank is that the Nonghyup Bank has always used a privately set up IP address, which happens to be the same as the Chinese IP address, and North Korean hackers usually use China's IP address to invade South Korea through China to confuse the truth and hide their whereabouts.

As far as South Korea is concerned, there is a tiger eyeing North Korea in the north, and if it is about to threaten the enemy North Korea that bombards Seoul, Li Kaiwen can hide the sky and cross the sea to invade in the name of the north, and the north does this anyway, just like hunting, he always has to do it several times a year.

And every time a cluster of hackers from the north roared in, South Korea was always abused to death, from the websites of the Blue House and the Grand National Party to television stations and banks.

Of course, Li Kaiwen's original intention was not to maliciously sabotage or steal, but to use a more gentlemanly method - to find the cyber security vulnerabilities of Korean companies and properly solve them, and then ask Korean companies to provide compensation.

If these companies are not interesting, hum, he Li Kaiwen is not a vegetarian, and he is equally proficient in what North Korean hackers in the north can do, ensuring that the methods are more brutal and bloody, and ensuring that South Korean companies are also eager to die.

For several nights in a row, Lee waited for his roommate Park Chang-hyuk to snore like thunder before he began to collect and search for system weaknesses and prevention vulnerabilities in Nonghyup Bank, and the progress was very slow due to time constraints, after all, his hacker's identity could not be exposed.

The IT infrastructure of Korea Nonghyup Bank is operated by an outsourcing team, which means that there are many people with senior management rights in both the outsourcing team and the IT department of Nonghyup, and once there are more people who have secrets, the secrets are no longer secrets.

It took a little time for Kevin Lee to hack into the personal computer of one of the deputy directors of the IT department of Nonghyup Bank, easily obtained the highest security privileges of SuperRoot, and set the personal laptop of the deputy director into a zombie computer for later use.

Since then, the entire network of Nonghyup Bank has been like a naked and graceful girl in front of Li Kaiwen, defenseless and unobstructed.

Kevin Lee searched the entire network of Nonghyup Bank, found several important vulnerabilities, wrote a patch software, and delivered it to the email address of Kim You-sung, the head of the IT department of Nonghyup Bank, and demanded a reward of $300,000.

$300,000 is really a conscience price, and if it is exchanged for Apple, Microsoft, and Kevin Lee, the price will be at least $3 million.

Koreans have always liked to be calculating, and Li Kaiwen is really afraid that his price will be high, and the stingy Koreans will not be willing to pay, so his previous actions will become useless. He, Li Kaiwen, is here to make a fortune, not to sabotage, if he can earn money while sitting, why bother standing.

The headquarters of Nonghyup Bank is located in Namdaemun-ro, Jung-gu, which is very magnificent.

Jin Youcheng, head of the IT department, walked into the company's headquarters building with a smile on his face, today is Friday, the last working day of March, and it is easy to complete today's work in two days.

Kim You-sung has been in charge for more than a year, and has been the head of the IT department since 2011, when the previous director resigned after the previous director resigned after the bank was suspected of being a North Korean hacker.

Since taking over the position, Kim has been conscientious and has been communicating with the management of IBM, the company responsible for the outsourcing of security services, on a daily basis to ensure that hidden dangers are detected and eliminated early.

Walking briskly into his office and laughing with the young and beautiful female secretary, Jin Youcheng felt that his body in his forties was youthful again.

Start the work computer as soon as possible, log in to the mailbox to check the email, this is Jin Youcheng's unchanging habit. Today, as if something special, the email was topped not by the familiar report from the bank's deputy head and IBM's security management team, but by an anonymous email.

The subject of the email was shocking, or at least shocking to Kim You-sung -- the security breach of Nonghyup Bank.