Its an windows password cracker software which is radely available on internet,

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2. OPHCRACK
FAKHAR-UL-HASSAN

3. OPHCRACK
Definition
– Ophcrack is a free Windows
password cracker based on
rainbow tables.
– It comes with a Graphical User
Interface and runs on multiple
platforms.
BASIC DESCION MAKING UNITS IN ECONOMY 3
OPHCRACK

4. OPHCRACK
⁻ Larger rainbow tables contain LM hashes of
passwords with all printable characters, including
symbols and spaces.
⁻ Ophcrack is available for Windows XP and as well as
another for Windows Vista and Windows7.
⁻ It become disable for the password longer than 14
characters.
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5. RAINBOW TABLE
⁻ A rainbow table is a precomputed table for
reversing cryptographic hash functions, usually for
cracking password hashes.
⁻ Tables are usually used in recovering the plaintext
password, up to a certain length consisting of a
limited set of characters.
⁻ These are different for different windows including
XP,Vista etc.
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6. How to use?
⁻ Load the Ophcrack CD to the computer, install and
run it.
⁻ Click Tables, and select the location or folder to store
the rainbow hash tables.
⁻ Go to the option Load and select the appropriate
password LM (LAN Manager) hash to use.
⁻ Select the type of tables you wish to use.
⁻ Click Launch to start the cracking process.
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7. ADVANTAGES
⁻ Free Windows password recovery software.
⁻ Works for Windows 7/Vista/XP.
⁻ No software installation is necessary to recover
passwords.
⁻ No knowledge of any existing passwords is
necessary.
⁻ Graphical User Interface and runs on multiple
platforms.
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8. DISADVANTAGES
⁻ Some antivirus programs mistakenly identify
Ophcrack as a Trojan.
⁻ The large ISO image will take you much time to
download.
⁻ Passwords greater than 14 characters cannot be
cracked.
⁻ Do not work for Windows server 2008(R2)/2003(R2)/
2000.
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