(Cat flutter Chinese) "You're like this, there's really something to trouble you." Lu Nan hurriedly said.

Chen Weiwen said speechlessly: "How can there be such a cheeky person in the world." ”

"What's the matter?" Huang Xiaoli asked.

Lu Nan took out two pieces of mobile phone cards from his pocket, put them on the glass turntable in front of him, and then pressed the button to start the turntable and sent the mobile phone card to Huang Xiaoli.

"Can this thing be restored?" Lu Nan asked.

Huang Xiaoli took the mobile phone card in his hand and looked at it carefully, and said, "Fortunately, the chip is not damaged, and there is still the possibility of restoration." ”

"Awesome, I knew you could do it." Lu Nan immediately gave a thumbs up.

Huang Xiaoli and they do the work of private detectives, and sometimes they inevitably have to copy other people's mobile phone cards to listen to other people's calls or retrieve communication records, so it is normal for her to master this craft.

"Don't be too happy, I have a chance to recover, but I can't guarantee it." Huang Xiaoli immediately added.

"What? Difficult? Lu Nan asked.

Huang Xiaoli nodded, "The mobile phone card is white, it is a chip card equipped with a microprocessor, and there are five modules inside, each module corresponds to a function, which is an 8-bit microprocessor, program memory, working memory, data memory and serial communication unit. ”

In the previous chip card, the five modules on the microprocessor were connected in series with metal wires, so the damaged chip could be restored to normal by simply reconnecting the wires between the chips.

One of the drawbacks of such a chip card is that it has poor security performance, because the connection between the chips is likely to be a way to illegally access and steal the mobile phone card.

"If this SIM card is of this type, then there is no problem at all to fix it." Huang Xiaoli said.

Next, she deliberately peeled off the plastic seal on the outside of the chip, then took out the miniature magnifying glass on the keychain and placed it on it to take a closer look.

"This is the latest chip card of yours, not a chip connected in series with metal circuits, but a chip that is all integrated on an integrated circuit board, and there is no way to restore such a chip." Huang Xiaoli said.

Lu Nan sighed: "Forget it, I'll think of other ways." ”

The implication is, if you can't do it, I'll try it with someone else.

How could Huang Xiaoli not know what Lu Nan meant, and immediately said arrogantly: "Die of this heart!" To tell you the truth, in Uptown, if even I can't restore this chip, it's even more impossible for others. ”

Lu Nan sighed regretfully, and said, "If you can't, you can't, originally I just asked you with the attitude of trying it out, but the main purpose of today is to invite you to dinner." ”

Burst!

Huang Xiaoli and the others immediately laughed, and said in their hearts, this guy can't ask for anything, and he began to pretend to be sincere again.

"You're really thick-skinned, but this sentence is quite good." After a pause, Huang Xiaoli continued: "Since that's the case, I'll help you again." ”

"Is there a way?" Lu Nan asked.

Huang Xiaoli nodded and said: "Of course there is a way, but it is still the same sentence, there is no guarantee of a 100% success rate." ”

"It's okay, let's be a dead horse doctor." Lunan Road.

After eating, Lu Nan took the time to teach Zhu Zhiguang two new dishes, and then went to their detective company with Huang Xiaoli.

It's a company, but it's actually just a studio, and the total size is only forty or fifty square meters.

Lu Nan walked into her work room with Huang Xiaoli, which was occupied by a two-meter-long workbench with three computers, and various instruments and tools such as electric soldering irons, heat guns, digital multimeters, oscilloscopes, and spectrum analyzers were placed in the vacated part.

"Because the chip on this mobile phone card is connected in series with integrated circuits, there is no way to restore it. I was only able to export all the data from each of the five modules to the new module and then reconnect them with the full integrated circuit board. ”

Huang Xiaoli explained to Lu Nan while working on his hands: "The first parts are not difficult, but the decryption work after the series is completed is very difficult. ”

"Decryption?"

"That's right! Because the chip of each mobile phone card has its encryption program, and the password in each set of encryption programs is different. These passwords are randomly combined with 26 letters and nine numbers to form a 15-digit string code, which is the hardest part to decipher. Huang Xiaoli said.

Some of these serial code combinations are complex, some are simple, such as a158764b5487417, this serial code, only two letters, all the others are numbers, it is relatively simple, and the possibility of cracking is very large. If there are more combinations of letters and numbers, the difficulty of solving will increase exponentially.

The reason is actually similar to stealing the password of the chat number, and the simpler the password, the more likely it is to be cracked.

Half an hour later, Huang Xiaoli had copied all the information on the phone card to the new chip and combined it into the new integrated circuit board.

The next step is the most difficult step to decrypt.

Huang Xiaolijiang's chip is connected to a special instrument, which is then connected to a computer.

Then, her fingers began to pound rapidly on the computer.

Half an hour passed, and a layer of fine beads of sweat had oozed from the tip of Huang Xiaoli's nose, and his frowning brows did not have the slightest tendency to soothe.

Another half an hour passed, and the clothes on Huang Xiaoli's back were already soaked with sweat, but a hint of joy finally appeared on her face, and it seemed that the decipherment work had progressed.

In the next ten minutes, Huang Xiaoli almost entered a state of forgetting about things and himself, and all his mind was focused on the computer screen in front of him.

Now she is no longer simply helping Lu Nan, but more challenging herself. In the process of deciphering, she gained a lot of insights that could take her skills to a whole new level.

Finally, when Huang Xiaoli's two fingers firmly hit the enter key, an expression of excitement and joy appeared on her face.

"Success?" Lu Nan asked.

Huang Xiaoli smiled proudly and said, "This string code is very complicated, but there is nothing that this sister can't do." ”

Lu Nan hurriedly put his head in front of the computer to look, only to see a very sci-fi interface, countless green characters scrolling rapidly.

In the bottom bar, the first half of the bar shows a combination of seven letters and numbers, followed by eight characters that are scrolling rapidly.

Soon, the eighth character stopped at the number "3", and the ninth character changed at a slower pace.

It seems that after all fifteen characters are stable, the characters in this box will be the deciphered serial code.

Cat flutter Chinese