It supports strong AES-256 encryption . Unlike standard ZIP, it can encrypt filenames , meaning no one can see what's inside the archive without the password.
The 7z format uses the LZMA algorithm , which consistently provides higher compression ratios (2-10% better) than standard ZIP. BfrogWife.7z
“7-Zip is leagues ahead of a lot of its competitors, it is not only efficient but also very easy to use generally. The nicest thing about 7-Zip is just how reliable it is even for the very large jobs.” SourceForge · 2 months ago It supports strong AES-256 encryption