This program allows us to configure this brute force attack, we will tell you to test only letters, letters and numbers, and even add symbols. In general, cracking a password of more than 12 characters will take us a long time to do it by brute force, therefore, you must take it into account. This method is the slowest because it will test all combinations, and it can take hours, days, and even years to crack passwords to a certain length. The brute force attack consists of testing all combinations of letters, numbers and symbols of a key with a certain length. We will be able to crack the passwords that are contained in the key dictionaries in a completely automated way.Ī remarkable aspect is that it not only tests the dictionary keys, but also adds numbers, uppercase, lowercase and symbols to the words that we put as “input”, in addition, it is also capable of combining words to test even more combinations of passwords and find the key used. The process consists of generating the hash of each password, to later compare the hash that we want to break, if the hash is the same then we have discovered the password, if the hash does not match then it is not the key and we will have to continue testing. This program allows us to crack passwords by dictionary, if we download one or more Internet password dictionaries of several tens of GB, the tool will be in charge of testing each and every one of these keys to try to crack the password hash. John the Ripper allows you to pause the cracking of the password and continue it at another time, this is ideal in case we have to turn off our PC or server, in addition, it can be automated to start cracking a certain password when starting our computer, and all this automatically without the need for system administrator intervention.
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