Chapter 1936 (2/2)

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.