The next morning, at the electronic warfare experimental building.

This lecture hall is very large, capable of seating hundreds of people, and each table is equipped with a military-grade computer.

The keyboard sat in the corner of the last row.

She tried very hard to avoid being noticed, but quite a few eyes still drifted over from her.

After all, that Mulan arm patch was far too conspicuous among the epaulets of the trainees.

"Is this the special forces soldier?"

In the front row, two male students huddled together, whispering amongst themselves.

"She looks ordinary, and she's as thin as a bean sprout."

"I guess he's a technically skilled person. But I heard the military region's big competition is coming up soon, how come he still has time to come here?"

"Who knows? Maybe she couldn't keep up physically and had to be sent back for retraining. Look at her timid and hesitant manner; she doesn't have the temperament of a top soldier at all."

The keyboard is bowed, its fingers unconsciously stroking the keys.

In the past, she might have buried her head even lower, or even wanted to find a crack in the ground to crawl into.

But now, Chen Zheng's face involuntarily appeared in her mind.

With a snap.

Professor Li placed a thick stack of documents on the podium.

He was an elderly professor with gray hair, quite famous in the field of electronic warfare, but also quite famous for his bad temper.

"Quiet!"

Professor Li adjusted his reading glasses, his gaze sweeping across the room. His eyes lingered briefly on a distinctive armband in the corner before moving away.

"Today's topic is very simple."

"I set up a simulated red zone defense system on the local area network."

"Your task is to obtain administrator privileges on the system without triggering any alarms."

As he spoke, he pressed the Enter key.

Suddenly, a long and complex network topology diagram popped up on the big screen, densely packed with defense nodes.

"Two hours."

"Whether it's SQL injection or port overflow, the methods are not limited."

"start!"

As soon as the command was given, the classroom erupted in a flurry of keyboard clicks.

All the trainees stared intently at the screen, their fingers flying across the keyboard.

This is a defense network personally built by Professor Li. Even if there are loopholes, there must be traps hidden inside. We must proceed with caution step by step.

In the corner, the keyboard user didn't rush to start using it.

She pushed up her glasses and stared at the system on the screen.

The conventional approach to penetration testing is to find vulnerabilities, disguise one's identity, and sneak in undetected.

This is also the standard tactic taught in the academy.

but……

"It looks quite ordinary."

What was said without malice may have been taken to heart by the listener, and the words they had just heard echoed in their ears again.

The fingers on the keyboard paused slightly.

Ordinary?

She was a soldier under Hua Mulan, a soldier trained by Chen Zheng.

If we use such lukewarm, conventional methods, wouldn't that embarrass that man?

"Since it's a special operations operation..."

The corner of Keyboard's mouth suddenly curled up, and his eyes were full of excitement.

"Then don't blame me for being uncivilized."

Just recently, Chen Zheng had taught her.

To win, you must use any means available.

Suddenly, the fingers on the keyboard moved.

She was trying to write a piece of virus code.

No need for disguise, no need for lurking.

Just like Chen Zheng's attitude towards the door of the brigade commander's office.

Open it directly.

The top students in the front row were still cautiously testing the firewall's reaction.

"This firewall is pretty good; it uses dynamic IP address changing, making it very difficult to lock onto."

"Don't worry, I've found a logical flaw and am trying to bypass it..."

Time passed second by second.

Three minutes later.

Professor Li, who was drinking tea on the podium, suddenly frowned.

The main control screen in front of him flickered.

Then, a massive data stream forced its way into his internal network.

"Huh? Who's being so reckless?"

Professor Li snorted coldly and reached out to cut off the source of the attack. "This kind of brute force attack is simply courting death..."

Before he could finish speaking, his hand froze.

Interception failed.

The data stream was not blocked by the firewall; instead, it directly modified the firewall's defense code, turning it into its own part!

"What...what the hell is this?!"

Professor Li stared wide-eyed as he watched helplessly as his administrator privileges were stripped away one by one.

next second.

Nourishing~

A sudden crackling sound came from the classroom.

The screen of the top student in the front row, who was preparing to bypass the firewall, suddenly went black.

"Huh? Why did it crash?"

Before he could react, the screen lit up again, but instead of the user interface, it displayed a blue screen.

It wasn't just him.

One by one, all the more than one hundred computers in the classroom changed color in the classroom.

boom! boom! boom!

In less than ten seconds, all the screens in the laboratory, which had been engaged in a tense battle of attack and defense, turned blue.

All user interfaces were locked, and typing on the keyboard had no effect.

In the very center of a blue screen, a line of bright red text jumped out:

[Mulan was here O(∩_∩)O]

The classroom fell silent.

All the trainees stared at the screen in disbelief.

"Holy crap... what's going on?"

"Infected? The entire internet is down?"

"But it's only been three minutes! I haven't even finished the port scan!"

"Is this a nuclear attack?! Who did this?!"

On the podium, Professor Li looked at his own computer, which also displayed a smiley face, and couldn't help but fall into deep thought.

Although he didn't care much, it was still a system he had created himself, yet it was completely wiped out in less than three minutes.

The other party not only gained access, but also hacked into all the computers in the classroom.

Professor Li suddenly raised his head, his gaze falling directly on the corner of the last row.

There.

Keyboard Master pushed up his glasses.

She still looked gentle, but the corners of her mouth were becoming increasingly difficult to keep in check.

Brush it!

The whole class turned around following the professor's gaze.

More than a hundred pairs of eyes turned to the seemingly ordinary transfer student.

The male student who had just mocked her felt a chill run down his spine.

You're so awesome, how come you're in our class?

Is this Mulan?

Even tech people are this brutal!

Professor Li took a deep breath, composed himself, and quickly walked from the podium to the keyboard.

"Did you write that virus just now?"

The keyboard shrank back and answered softly, "Report... Yes."

"What algorithm is used? How can it directly assimilate the underlying protocol?"

"My self-made algorithm."

He scratched his head awkwardly. "I just thought that if I infiltrated the system and changed the whole thing to my own, no one would know."

"This is...this is a tactic taught by our instructors."

Upon hearing this, Professor Li's lips twitched slightly.

This kind of attack method, which is based on the idea that "if I kill everyone, no one will know I infiltrated," is extremely destructive and completely disregards the consequences. It is definitely not something that can be taught in an academy.

Professor Li remained silent for a long time, looked at the keyboard, and couldn't help but sigh.

"Alright, let's pack our things."

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