0NobodyInParticular 10 years ago ReplyUpvoteYes, there are freeware password recovery programs for the ZIP format. The paper "A Known Plaintext Attack on the PKZIP Stream Cipher" (http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1994/CS/CS0842.ps.gz) by Eli Biham and Paul Kocher was one of the early explanations of how to do it.
0countable 10 years ago ReplyUpvoteI looked for a zip password cracker a while ago, but i could'nt find any that weren't free. They do exist but i never tried them, sorry if that's little help.
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10 years ago
Yes, there are freeware password recovery programs for the ZIP format.
The paper "A Known Plaintext Attack on the PKZIP Stream Cipher" (http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1994/CS/CS0842.ps.gz) by Eli Biham and Paul Kocher was one of the early explanations of how to do it.
10 years ago
I looked for a zip password cracker a while ago, but i could'nt find any that weren't free. They do exist but i never tried them, sorry if that's little help.