It supports AES-256 encryption, allowing users to password-protect both the contents of the files and the filenames themselves.
A 7z file is a container that can hold multiple files and folders in a single, smaller package. It utilizes the and LZMA2 compression algorithms, which often result in significantly smaller file sizes—between 30% and 70% smaller—compared to the standard ZIP format. Key Features of the 7z Format Aden.7z
The format is part of the 7-Zip project, which is free to use for both personal and commercial purposes. It supports AES-256 encryption
You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. Creating Encrypted ZIP files with 7-Zip - DCU Aden.7z