Chapter 25: Two Bombs and One Star Huang Jenxun

There is no doubt that the most direct and effective way to verify whether Xiaoqi is a god or not is to open the contract text file, and then turn directly to the author's information page, you can see the detailed personal information of God Wu Nana - at that time, the true identity of God Wu Nana will be exposed. Pen | fun | pavilion www. biquge。 info

However, there is a huge obstacle in this most direct road - that is, the password. In general, if you want to crack a password, the faster way is usually to use some hacker dictionary, social worker database, etc., and try through the existing password field. However, it seems unlikely that encrypted documents that are only passed between Dianniang and the author will use passwords set by other individual users on the Internet. Therefore, if you want to find a ready-made password directly, it must be no fun - you can only honestly take the road of brute force cracking.

So the problem comes - brute force cracking itself has no room for optimization in terms of algorithms, and the idea of reducing time complexity is actually not feasible, so the only thing that can be considered is to make a fuss about computing power. The computing equipment that Jiang Yucheng has on hand is just a Thinkpad laptop with outstanding performance - the floating-point computing performance of the low-voltage version of the i5 processor can be said to be more than enough for daily applications, but it is not enough to crack the password and even plug the gap between the teeth.

Where can I find powerful computing power? Jiang Yucheng's first thought must be the powerful-looking iMac in his sister's room on the second floor of his house -- whether it is his father or Aunt Han, they are very fond of their little sister, and she, as a tentacle, needs to use a computer to suppress videos, and the performance of the PC will definitely not be bad. But that would put the cart before the horse—after all, she and Sansa weren't reconciled yet, and Sansa couldn't let herself use her computer. Moreover, Apple's heat dissipation has always been clumsy, and after high-intensity computing hits the power consumption wall, the actual frequency and performance may not even be as good as your own notebook.

So, is there any more powerful computing equipment? The needs of college dogs for computers are nothing more than choosing a class to watch a courseware, watching a soap opera or 11 area anime on the Internet, and playing games such as DOTA and the Elementary School League. These applications do not require high CPU floating-point computing capabilities. So borrowing a computer from a classmate is probably in vain. Speaking of which, under the science building where the Faculty of Science is located, there seems to be a UNIX server with N Zhiqiang processors calculating quantum mechanical models for the physics department! But even if you are a physics student, you may not be able to divide a few cores in normal times. People don't know, they can't predict it -- why do you say that you are a chemistry student, why do you have to use the supercomputing of the physics department?

The road is cut off - Jiang Yucheng is almost in despair. Himself, as expected, is still too small. If Nana's guy wants to find someone, then he will definitely use his connections in the industry to directly give the other party flesh!

Although he had decided to give up in his heart, Jiang Yucheng still wanted to struggle one last time, what if there was a way? So he entered the keywords "Word document cracking" into the Google search box, and then gently pressed enter...

Sure enough, there was still nothing useful. The tools I found on the Internet were all already used by myself, and they didn't work at all. Just when Jiang Yucheng was about to click the cross in the upper right corner to close the window, a new search result suddenly popped up in front of his eyes:

GPU-based Word document password cracking - source: CNKI space

"Eh?!?!??!"

The flame of hope was once again rekindled - Jiang Yucheng quickly logged in to the school network with a VPN, and then downloaded the paper from CNKI with the help of the IP of the school network. When the prompt to complete the download appeared, Jiang Yucheng almost couldn't wait to open the paper-

"With the wide application of desktop systems, Microsoft's OFFICE series software has become the mainstream text editing software, and the security of Word documents has gradually entered people's field of vision, and it is of great significance to find an efficient solution to crack or recover the password of the encrypted Word document.

Brute force cracking of passwords is the simplest and most commonly used cracking method, but the traditional CPU-based cracking method is slow to crack, which greatly limits the application of brute force cracking. Based on the analysis of the encryption vulnerabilities of Word documents, a GPU-based CUDA parallel computing model is proposed, which realizes the rapid brute-force cracking of the encryption password of Word document, and the experimental results show that the password cracking scheme in this paper greatly improves the cracking speed・・・・・・"

Eh--this seems to be very feasible! The original desktop computer at home with dusty can now be taken out and used-I just bought a second-hand GTX690 last week, and I plan to install it to play games, but it was delayed because of Shanshan and Nana's affairs. And now, it's time to put the power of the tactical graphics card to work!

Well, that's it!!! Jiang Yucheng thought - just do it, Jiang Yucheng opened VS with ease, and according to the algorithm given in the paper, he knocked on the code......

While waiting for the cracking, Jiang Yucheng went to the hardware store - the faucet in Xiaoqi's house was broken, and this kind of thing naturally had to be solved by Jiang Yucheng, a boy. As a technical nerd student studying science and engineering, Jiang Yucheng is naturally quite sensitive to these mechanical and electronic things. When he was in high school, he also helped his father change the faucets and wall sockets in the house, and of course there was no pressure on these tasks. To say that this matter is small, it is to enhance the harmonious relationship between neighbors, and to say that it is also an important event to brush up on favorability, oh hahahaha (please make up your own brain)!

The 690 tactical nuclear graphics card was still in its room at this time, destroying the 40-bit encrypted ciphertext of the Word document with the destructive power of the aircraft carrier killer. The paper gives a statistical chart of the time it takes to crack the six-digit cipher, and it takes about 16 hours for the TeslaC1060 to crack the six-digit password. The two GK104 cores of Kepler's flagship graphics card have a huge increase in computing power compared to the GT200 cores of Tesla's architecture four years ago, and the number of cores has also doubled. Therefore, the calculation program written by Jiang Yucheng itself estimated the remaining time to be about three hours.

Speaking of which, Jiang Yucheng is obviously a senior magician, but he has never shown any potential to attract girls before. I don't know what's going on now.,I really seem to have some of the characteristics of the Galgame male master.,It seems like he's really going to open the route of young taming.。 Could it be that in the future, I really want to embark on the road of becoming a hundred and fifty catties of fuel as Mr. Wang said? In the future, do you want to start some ** plot, what Shura field or something like that? Yadayo, I will be very troubled in this case, hahahahahaha (still Director Jin)!

Jiang Yucheng's brain is so open-minded, not so much because of his online writer's brain supplementation ability, but because he is too nervous - one of the main reasons why he volunteered to go to the hardware store is that Jiang Yucheng wants to settle down his restless heart. But it backfired, as the time for the completion of the calculation gradually approached, Jiang Yucheng's heartbeat became faster and faster - obviously when the college entrance examination results were released, he was not so nervous!! Could it be that he cared so much about this Nana's true body? Or did he actually care about the proposition that "Xiaoqi is Nana"?

Or... Or are you actually immersed in the idea that "spring has finally arrived"?

Thinking of his pale emotional experience in his freshman year, Jiang Yucheng suddenly had a sense of fear that his future was uncertain. Of course, it feels good to get along with Xiaoqi now, but there is obviously a big gap between childhood sweethearts and real lovers. In terms of universality, he lacks understanding of love, and in terms of particularity, he understands Xiaoqi...... After all, after the estrangement of high school, Jiang Yucheng himself did not dare to say that he knew the current Xiaoqi.

The knee-jerk reaction of humans in the face of the unknown is clearly fear. The "Good Guy Card" hung over his head like a sword of Damocles. Although girls usually carry the phrase "I hope we can still be friends in the future" when they issue cards, the relationship between the two people will actually become very strange - even if you want to go back to the past, it is simply impossible.

Although sometimes I have some delusions about the girls in reality, such as strategy, pushback, etc., but real love is really troublesome! Whether it is a docile and considerate soft girl like Xiaoqi, or a maverick guy like Yu Baochen, they are always some characters who are incomprehensible, uncertain, and bottomless. In contrast, isn't the two-dimensional girl much better? I won't hide it, I won't deceive, I can always be trusted, and even if I get annoyed for a while, I can read the file and start again......

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Starting Point Chinese www.qidian.com welcome book friends to come and read, the latest, fastest and most popular serialized works are all original at Starting Point!