Search results
Results from the WOW.Com Content Network
DaveGrohl supports all of the standard Mac OS X user password hashes (MD4, SHA-512 and PBKDF2) [1] [2] [3] used since OS X Lion and also can extract them formatted for other popular password crackers like John the Ripper. [4] The latest stable release is designed specifically for Mac OS X Lion and Mountain Lion.
In cryptanalysis and computer security, password cracking is the process of guessing passwords [1] protecting a computer system.A common approach (brute-force attack) is to repeatedly try guesses for the password and to check them against an available cryptographic hash of the password. [2]
A brute-force attack is a cryptanalytic attack that can, in theory, be used to attempt to decrypt any encrypted data (except for data encrypted in an information-theoretically secure manner). [1] Such an attack might be used when it is not possible to take advantage of other weaknesses in an encryption system (if any exist) that would make the ...
One of the modes John can use is the dictionary attack. [6] It takes text string samples (usually from a file, called a wordlist, containing words found in a dictionary or real passwords cracked before), encrypting it in the same format as the password being examined (including both the encryption algorithm and key), and comparing the output to the encrypted string.
The EFF's "Deep Crack" machine contained 1,856 custom chips and could brute force a DES key in a matter of days — the photo shows a circuit board fitted with 32 custom attack chips. In cryptography, a custom hardware attack uses specifically designed application-specific integrated circuits (ASIC) to decipher encrypted messages.
The U.S. government ordered Apple to produce an IPSW file that would allow investigators to brute force the passcode of the iPhone. [7] The order used the All Writs Act , originally created by the Judiciary Act of 1789 , to demand the firmware, in the same way as other smartphone manufacturers have been ordered to comply.
Key stretching also improves security in some real-world applications where the key length has been constrained, by mimicking a longer key length from the perspective of a brute-force attacker. [1] There are several ways to perform key stretching. One way is to apply a cryptographic hash function or a block cipher repeatedly in a loop.
After enough packets have been collected, the program can then compute the key for the wireless network. As the software makes use of brute-force attack however, cracking the encryption can take between a few hours to several days, based on the activity on the network. [3]