1c19b35b005744d55261682b361804fa How to solve the information processed by the MD5 algorithm?

MD5 cipher hack (decryption) can be said to be an essential link in the network attack, is an important "auxiliary tool" in the tool. MD5 decryption is mainly used for network attacks, in the site and other intrusion process, it is possible to obtain the administrator or other user's account and password value (MD5 encrypted value). There are two cases of the password value obtained, one is plaintext, and the other is the plaintext is encrypted. If the password value is encrypted, this time it is necessary to determine the value of the password, if it is to take MD5 encryption, you can md5crack3 and other software to crack. Professor Xiao's MD5 password collision algorithm has not been published, so the current Md5 decryption method mainly to take brute force, that is, the software through the algorithm to generate a dictionary, and then use the MD5 function to encrypt the value of the dictionary to form a ciphertext, and then with the need to crack the cipher to compare, if the same is considered to crack success. At present, there are many Web sites to provide MD5 encryption or encrypted value query, the encrypted MD5 value, entered into the site, if the site database exists in the MD5, the value corresponding to the MD5 encryption before the value of the password. This case shows how to use Md5crack3 and some online websites to hack; Md5crack3 wrote a MD5 password cracking software Md5 cipher hack (decryption) can be said to be an essential link in the network attack, is an important "auxiliary tool" in the hacker tool. MD5 decryption is mainly used for network attacks, in the site and other intrusion process, it is possible to obtain the administrator or other user's account and password value (MD5 encrypted value). There are two cases of the password value obtained, one is plaintext, and the other is the plaintext is encrypted. If the password value is encrypted, this time it is necessary to determine the value of the password, if it is to take MD5 encryption, you can md5crack4 and other software to crack. Professor Xiao's MD5 password collision algorithm has not been published, so the current Md5 decryption method mainly to take brute force, that is, the software through the algorithm to generate a dictionary, and then use the MD5 function to encrypt the value of the dictionary to form a ciphertext, and then with the need to crack the cipher to compare, if the same is considered to crack success. At present, there are many Web sites to provide MD5 encryption or encrypted value query, the encrypted MD5 value, entered into the site, if the site database exists in the MD5, the value corresponding to the MD5 encryption before the value of the password.

2. Generate MD5 password via CMD5 website

Enter the address "http://www.cmd5.com/" in the browser, enter the original password that you want to encrypt in the input box, then click the "MD5 Encrypt or Decrypt" button, 1, the original password is "Goodman88", the encrypted password value is:

MD5 (goodman88,32) = d5a8e0b115259023faa219f5b53ca522

MD5 (goodman88,16) = 15259023faa219f5

　　

Figure 1 MD5 encryption

As experimental data, we are generating a set of MD5 passwords for birthdays as follows:

MD5 (19801230,32) = 2540bb62336a8eb3ebc1e42ee44c8e3d

MD5 (19801230,16) = 336a8eb3ebc1e42e

& Description

(1) In Md5crack4, you can also define a combination of numbers, letters of size, and special characters to crack.

(2) If the computer configuration is better, you can set up more threads.

(3) If the custom is cracked, it is recommended to first select the use of numbers, followed by a combination of numbers, size letters, special characters. Crack the first easy after the difficult, otherwise crack time too long.

(4) In Md5crack4 can also "use plug-in" to crack.

(5) In the MD5CRACK4 can also set the language version of the software display, there are two versions of Chinese Simplified and English, click on the main interface settings (Option), you can set, 9 is shown.

　　

Figure 9 Setting Md5crack4

　5. hack multiple passwords at once

will need to crack MD5 password all stored in a TXT file, each password on a separate line, and then click "Crack multiple Ciphertext" in Md5crack4, select the MD5 password file just edited, 10, choose a crack, in this case choose to use a digital dictionary to crack, and finally click Start button to start the hack.

　　

Figure 10 Cracking multiple MD5 password values

At the bottom right of the md5crack4 will show the cracked results, click "Log" to view the MD5 value check and other log information, click "Results" can see the results of the cracked, 11, in the results will be the MD5 value and the original password one by one corresponds.

　　

4. Use the numbers in the character set (Char muster) to hack

Put the generated number MD5 value "336a8eb3ebc1e42e" into the single MD5 password cracking input box, select "Char Muster", then you can select "Numbers", "lowercase", "majuscule", "special Char "and" custom "are cracked, in this case using numbers for Flamebreak, so" min length "is set to" 1 "," Max Length "is set to" 8 ", and then click the" Start "button, use the number to MD5 crack, Try to crack the number of passwords from 1~9999999 to all combinations of numbers, 8 shows that its password value cracked successfully and cracked the result for "336a8eb3ebc1e42e---> [19801230]".

　　

Figure 8 using numbers to hack

1c19b35b005744d55261682b361804fa How to solve the information processed by the MD5 algorithm?