Univers cryptography

Software you need to Hack something.

*Cracker
Eric S. Raymond, author of The New Hacker's Dictionary, advocates that members of the computer underground should be called crackers. Yet, those people see themselves as hackers and even try to include the views of Raymond in what they see as a wider hacker culture, a view that Raymond has harshly rejected. Instead of a hacker/cracker dichotomy, they emphasize a spectrum of different categories, such as white hat, grey hat, black hat and script kiddie. In contrast to Raymond, they usually reserve the term cracker for more malicious activity.

According to Ralph D. Clifford, a cracker or cracking is to "gain unauthorized access to a computer in order to commit another crime such as destroying information contained in that system". These subgroups may also be defined by the legal status of their activities.

*White hat
A white hat (or a white hat hacker) is an ethical security hacker. Ethical hacking is a term meant to imply a broader category than just pe*******on testing.An ethical hacker is always on the lookout for flaws in a company's network and works to strengthen it. Contrasted with the black hat, a malicious hacker, the name comes from Western films, where heroic and antagonistic cowboys might traditionally wear a white and a black hat, respectively.There is a third kind of hacker known as a grey hat who hacks with good intentions but at times without permission.[Symantec Group 1]

White hat hackers may also work in teams called "sneakers and/or hacker clubs",red teams, or tiger teams.

*Black hat
A black hat hacker is a hacker who "violates computer security for little reason beyond maliciousness or for personal gain" (Moore, 2005). The term was coined by Richard Stallman, to contrast the maliciousness of a criminal hacker versus the spirit of playfulness and exploration in hacker culture, or the ethos of the white hat hacker who performs hacking duties to identify places to repair or as a means of legitimate employment.Black hat hackers form the stereotypical, illegal hacking groups often portrayed in popular culture, and are "the epitome of all that the public fears in a computer criminal".
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