In modern zip utilities like 7zip, you can specify a password when creating a .ZIP file. But, how secure is this? What encryption algorithm(s) are used to secure password-protected zip files?
7-zip uses AES-256 encrpytion for 7z/zip archives.
The help files of 7-zip says this about the security of a passworded 7z file:
Brute force attacks are a waste of time. I won't go into details why, I will instead direct you to Jeff Atwood's blog, he has an excellent post.
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