: Cybercriminals frequently use password-protected 7z files to bypass email security scanners, which cannot inspect the contents of encrypted archives.
: To open or extract a .7z file, specialized third-party software like 7-Zip or WinZip is required, as most operating systems do not support it natively.
: Unlike formats that compress files individually, 7z often uses "solid" compression, treating all files as one continuous stream to improve efficiency. Security and Practical Considerations