The principle explanation of cracking is a must see for beginners

2024-08-12 23:06:18

The speed of cracking depends on two aspects, one is the speed of the computer, which is the decisive factor, and the other is the encrypted format of the file. Take the archive as an example, the zip format will be relatively fast, and the 7z format will be the slowest. The same software is used to crack on behalf of the computer, the different computers are used, the use of clusters, multiple cracks, or large computers, the speed is incomparable to personal computers, even so, sometimes a complex encrypted file still has to be cracked for a day or two. Therefore, cracking is a technical job, don't think that you will succeed by directly downloading the software and handing it over to the computer with brute force cracking. To crack a complex code, you need to learn some techniques. Let's talk about the principle of cracking:

1. What is brute force? （Brute-force)

Brute force cracking, or brute-force method, is a method of deciphering passwords, i.e., calculating passwords one by one until the true password is found. For example, a password that is known to be four digits and consists entirely of numbers may have 10,000 combinations, so it will take up to 10,000 attempts to find the correct password. Theoretically, any kind of password can be cracked using this method, the only question is how to shorten the trial and error time. Some people use computers to increase efficiency.

In fact, even if it is a brute-force cracking method, it is helpless for some passwords with a certain degree of complexity, although the computer computing speed is fast, but it is not fast enough to process hundreds of millions of test operations in a limited short time, why do you say so? For example, suppose the password has only 8 digits, each of which may be 26 letters (52 kinds of case divised), plus 10 numbers, and then add some special characters (such as @#$%^, etc., assuming there are only 10, but in fact, there are more than that), that is, the probability on each bit is 52 + 10 + 10 = 72, and the 8-bit traversal is the 8th power of 72, which is about 600 trillion !! Unless cracked using a large cluster computer. In this way, it takes a long time to crack a password on a personal PC, which is usually a complex password, and sometimes if you are lucky, you can try it right in a few minutes.

2. What is dictionary cracking? (Dictionary)

First explain the dictionary file, the dictionary file is a text file that hackers think that some network users often use passwords, as well as passwords that have been obtained by various means before, a text file that is collected together, and the cracker program will automatically test them one by one, that is, only the cracked user's password exists in the dictionary file, it will be found in this way, don't underestimate this method that seems to be full of waiting, because there are often different hackers on the network who exchange dictionary files with each other, Therefore, a dictionary file circulating on the Internet usually contains the accumulation of a lot of hacker experience, and the cracking rate is very high for users with low security awareness.

3. What is Xieve Hack?

It is a type of brute-force cracking, which only checks the common character combinations in English words, and it can skip nonsensical character combinations to increase the speed of brute force cracking

4. Known Password/Part

It cracks by checking some ways of entering passwords in "Values", and you can check if some passwords are correct without having to open the file. The crack can be combined with other cracks using the merge crack option, for example: if you know that one word of your password is "1980", you can set the "value" to "1980". Joint dictionary cracking and known password/partial cracking using merge cracking

5: Previous Passwords

Previous Password Crack, which recovers the password by checking for other cracks previously used for other files, automatically saves all found passwords

6. Hack the role of modifiers

There are two sub-functions under the Crack Regulator: Change Calling and Reverse Password. For example, when selecting the change letter of the Crack Regulator, select a Xieve Crack. Then all the password words in Xieve will be changed to uppercase, lowercase, turn, mix, etc

7. Join Attacks

Merge and crack is to crack the password in segments, for example, the length of the password is 8 digits, the first four digits are known, 1234, and the last four digits are unknown, then choose to merge and crack the total number of digits of the password to 8 digits. Add a known password/select 1234 after partially cracked "Value" password length from 1 to 4; Another part of the unknown selection brute-force hack, the length is selected from 5 to 8