Must invade the system first to hinder us will be network administrator's first security defense line - - legitimate user name and the password, it decides in you in this website jurisdiction, therefore the password invasion law may say that is hacker's foundation, just started regarding one to study HACK net friend this article possibly to let you have greatly.
When before we must try deciphers, us to understand first encrypts the process, concurrently in encryption's many type, we speaks the standard UNIX encryption technology, but were very few about the DES encryption technology's material this is mainly IBM should the US National security Bureau's request decide as certain documents the national secret documents, but under a UNIX encryption procedure Crypt(3) actually widespread spreading, even its source code everywhere might result, its encryption process was as follows:
1. takes out the password with clearly marked price by the main text form.
2. takes the key word the password, with a series of “0” carries on my screen encryption.
3. transforms a 64 binary value take 56 as the variable foundation only 64 binary value, encrypts again as the key words.
In view of the fact that CRYPT (3) big encryption randomness, 56 key words' existence possibilities surpass 7×10E16 the kind, therefore the wish reversion decoding is impossible. But whether real non solution? Wrong!
We may use the comparison test, its method is as follows:
1. obtains a dictionary file, it is a single vocabulary.
2. carries on the encryption these words with user's encryption procedure (to conform to the DES standard).
3. carries on the comparison after each word encryption's result and the goal encryption's result.
If matches, then this word is the encryption key words. Now already had some procedures to be able to help us to complete the above work, causes the decipher changes by its simple, but after we must do are grasp the encryption password document. This kind of software commonly used has Carck, Jack14, Joun.
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