Chapter 1936

Qin Feng left.

Three people stay here. You look at me, I look at you, and then look at the magnificent houses around. It's really a bit like a dream.

You know, in China, their accommodation environment is not bad.

But that's only in comparison with ordinary people.

Basically speaking, it means living in a building with two bedrooms and one living room, which is relatively spacious and bright.

At that time, they already felt very good.

However, come here and look at the manor villa. A bathroom is almost as big as their whole room.

Just think about it.

The house I used to be proud of is now the size of a bathroom, and it is not as luxurious as people.

Of course, they were very moved by the importance they attached to Qin Feng.

In this way, living in such a luxurious manor villa, if you don't value them, it must not be.

Otherwise, who will waste the money.

And all kinds of training facilities are complete.

This is comparable to the army.

And there are more guns than the army.

"Well, everybody, let's find a room to rest." The gun scar man grinned, "since we are three people, we always have a primary and secondary. So, we'll have a game later and decide who's the boss! "

The other two looked different, but they finally nodded and agreed.

At this moment, after Qin Feng left here, he returned to his RV.

Although it is said that the manor villa also makes Qin Feng excited.

Moreover, Qin Feng doesn't have to stay at school at all. It's OK to live in a manor villa.

But that place is not safe.

For Qin Feng, that's it.

That place is so spacious that there is no privacy at all.

Of course, the privacy in Qin tuyere is not the same as that in the eyes of ordinary people.

The place is too big. Once it is invaded, you don't know at all.

Although Qin Feng has no secret.

But once the secrets they own are discovered, they will fall apart.

At that time, I'm afraid heaven and earth will not allow.

Therefore, Qin Feng must be careful. And this RV is undoubtedly the safest place.

Of course, it is not really safe.

The other party really wants to rush in. When he is away, the things in the computer may not be saved.

For example, the other party directly comes up and removes the hard disk first, and then copies it.

The overall hard disk data is copied. In that case, even if the data is accidentally damaged, it doesn't matter. Each other, you can try slowly.

If it doesn't work, just copy another one.

Therefore, I have to find a way to lock the data of the hard disk to avoid being copied.

Qin Feng wanted to talk to boss Ming on the phone about this time.

Boss Ming has explained before. If you have any results and, let him know.

Although boss Ming can't change anything, he can make some preparations.

However, Qin Feng suddenly thought of this and put aside the idea of talking to boss Ming.

For Qin Feng, on the whole, he is still an it man. At this point, like other it men, if you have any ideas, you must put them into action.

If we don't solve the problem, we can't.

So, this study, just a week.

For a whole week, Qin Feng went out to eat in addition to staying in the RV.

But a week's time also made Qin Feng have results.

The hard disk can indeed be removed directly and copied.

This data cannot be blocked from copying.

This is a physical plug-in. You can't defend it with software. How do you defend when the system is not turned on?

Therefore, the whole hard disk can only be locked.

When the hard disk sector reads data, it is unlocked directly. Cannot read without unlocking.

In this way, login is really troublesome. You need to enter a password of at least 32 bits.

And passwords including case, and various symbols.

Such a password can be cracked theoretically, but it needs countless attempts.

Qin Feng estimated that in terms of the computing power of human computers, it will take at least a million years for a supercomputer to crack.

Of course, if we graft global computers and crack them together, it will be very fast.

Maybe it won't take a year.

But the problem is that you can't graft.

If you crack it, Qin Feng sets a limit, that is, if you try 10 times or fail, all data will be destroyed automatically.

The reason for this is that the data is too long.

32 bits, but also contains case, and special symbols. This makes Qin Feng very stressed.

If you are not careful, you may lose wrong. Therefore, Qin Feng gave himself 10 chances to make mistakes.

That sounds like a lot of chances for 10 mistakes.

But for trying to crack, after 10 times, it will be destroyed automatically. What else?

Of course, Qin Feng also assumed that the FBI had cracked it. If the limit was cracked, a software could be realized for grafting. At the same time, a large number of computers crack together.

But that requires a medium, a hard disk.

You must copy enough hard disks at the same time, and then crack them at the same time. In addition, after the software is planned, you can break the password into groups.

In that way, group cracking can be carried out.

However, there is also a premise that you have to get so many hard drives out.

According to Qin Feng's estimation, if you want to crack it within a year, you need at least hundreds of millions of hard disks.

Of course, this may not be enough.

Because a hard disk can only be cracked 10 times.

After 10 times, the data is automatically destroyed.

Of course, this destroys the program. It is impossible to physically force all data to be erased at one time, and it needs to be erased many times.

Well, a hard disk, according to Qin Feng's calculation, theoretically has three opportunities to try. That's 30 hacks.

100 million hard drives, that's not a small number.

And that's not enough.

Really want to crack, well, you get a $10 billion to see if it's enough.

After all, 32-bit passwords, passwords with letters in case and special symbols, have a total of

Qin Feng made a rough calculation. It's really astronomical.

26 uppercase letters, 26 lowercase letters, 10 numbers (0-9), a total of 62, plus those special symbols that can be used, a total of 68, then the 32-bit password has 68 ^ 32 (the 32nd power of 62), about the 57th power of 2.272657884496751e, super astronomical number!!!

This is really an amazing number.

Ten billion hard disks are not enough.

Therefore, Qin Feng just let go of his heart at the moment.

However, the 32-bit password, including case and special symbols, is also a headache for Qin Feng.

Although I always have a good memory. However, such a long password can also make mistakes.

In particular, people's memory is very unreliable in some ways.

Hey, headache, how to write it down? Take notes? This is the most unreliable! Easy to see, that's over.