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I know that if we use a complicated password for zip files that has more than 8 characters, it's quite safe and can't be cracked easily...
For example, for an 8-digits complicated password (containing ABC,abc,123,!@#), it takes 83.5 days for a supercomputer to test all combinations, and 22 years for a 9-digit!!!!)
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But in an example, we have an encrypted zip file that contains multiple files, and we have the extracted form of one of those files
In this case and with having the original and zipped-encrypted file, can we write a program that cracks the password easily...? Not by taking months or even years to crack?
It it's possible, there will be problems; for example, a zip file may contain ""thumbs.db"" or ""desktop.ini"" files, that use almost the same pattern everywhere... and more common: every file format has its own hex pattern too!!! (For example, EF BB BF for UTF-8 text files)... and situations that we know the contents of a part of a text file... etc.