different attack types

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3) What is the permutation attack type? What do the perm-min and perm-max do?

quick example: word from dictionary is "abc", permutation attack mutates it to:

abc
acb
bac
bca
cab
cba

tip: your dictionaries can be optimized for permutation attack by removing duplicates. for example if you have these two words in your dictionary "abc" and "acb" they generate exactly the same words. so you should remove them. to do this use the "prepare" program from hashcat-utils and sort -u them afterwards.