It supports strong AES-256 encryption , ensuring that sensitive data within the archive remains protected.

While "MMM28p" does not correspond to a public 7-Zip version (the current stable is 26.01 ), the .7z extension signifies it is an archive using the highly efficient . Format & Technology Review

The is an open-source, high-compression archive format developed by Igor Pavlov. It is widely considered superior to the standard .zip format for storage and security.

The format can handle massive files—up to 16 billion gigabytes —and supports "solid compression," which packs similar files together to further reduce size.