Why use strong passwords?


 
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Special Forums Cybersecurity Why use strong passwords?
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Old 11-07-2012
I found this article; it has changed some of my opinions, and has a good explanation of password cracking techniques. GeodSoft How-To: Cracking Passwords Techniques
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SUCRACK(1)						      General Commands Manual							SUCRACK(1)

NAME
sucrack - is a multithreaded Linux/UNIX tool for brute-force cracking of local user accounts via su. SYNOPSIS
sucrack [options] wordlist DESCRIPTION
sucrack is a multithreaded Linux/UNIX tool brute-force cracking tool that drives su(1) with referencing a specific user and uses words from a wordlist as passwords. Running sucrack does not require high privileges on the target system. OPTIONS
sucrack allows reading passwords from stdin. In that case, use '-' instead of a filename as wordlist parameter. Common options: -h print help message -a use ansi escape codes for nice looking statistics (requires --enable-statistics configuration flag) -s <seconds> statistics display intervall (requires --enable-statistics configuration flag) -c only print statistics if a key other than `q' is pressed -r enable rewriting of dictionary words (see rules below) -w <num> number of threads to run with. -b <size> size of the word list buffer -u <user> user account to su to -l <rules> specify certain rules for the rewriting process Rewriting rules: A Rewrite word with only upper case characters F Rewrite word with first character as upper case L Rewrite word with last character as upper case a Rewrite word with only lower case characters f Rewrite word with first character as lower case l Rewrite word with last character as lower case D Prepend each digit (0-9) to the word d Append each digit (0-9) to the word e enleet the word x apply all rules to a word ENVIRONMENT VARIABLES
SUCRACK_SU_PATH The path to su (usually /bin/su or /usr/bin/su) SUCRACK_AUTH_FAILURE The message su returns on an authentication failure (like "su: Authentication failure" or "su: Sorry") SUCRACK_AUTH_SUCCESS The message that indicates an authentication success. This message must not be a password listed in the wordlist (default is "SUCRACK_SUCCESS") AUTHOR
Nico Leidecker <nfl@portcullis-security.com> http://www.leidecker.info SEE ALSO
su(1) Version 1.2.3 SUCRACK(1)