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: A unique feature of 7z is the ability to encrypt the archive headers . This prevents unauthorized users from even seeing the names of the files inside the archive.
: While 7z offers maximum space savings, it is generally 2–5 times slower to compress and decompress compared to the ZIP format. 3. Security and Features
: It uses AES-256 (Advanced Encryption Standard) with a 256-bit key for securing archive contents.
: Unlike many other formats, 7z can treat multiple files as a single continuous data stream, significantly increasing the compression ratio by identifying redundancies across different files.
: It employs pre-processing filters such as BCJ/BCJ2 for executable files, which optimizes them for even higher compression efficiency. 2. Performance Benchmarks