Although there are many existing tools available for password cracking, the
dierence between these tools is not the technique they employ but the password
types they support. Second consideration is a distribution of the speed, which
tools can make guesses as well as the hardware tools that are taken into the
account. Many password cracker tools can perform their hash calculation on
CPU (Core Processor Unit), GPU (Graphical Processor Unit), or FPGAs (Field
Programmable Gate Arrays). Most of those tools can perform on-line or oine
passwords cracking. This paper will examine the proposed two types of methods,
with the examples and tools that can be employed, the most common tools.
Programs such as THC Hydra2 , and NCrack3, are specically tailored to
attack network services and on-line websites. These programs are optimized to
perform on-line password cracking attacks with network scanning ability and
other features built into. Because they perform on-line attacks, these tools are
also generally run by the use of very small input dictionaries due to the fact that
they were often only allowed a few guesses against each on-line target [20].
For instance, tools that can perform an oine password cracking attack are
listed below with arguments and notes: