What format is 7z?

7z is an efficient compression format, a file format that can use a variety of compression algorithms for data compression, and has an extremely high compression ratio. The 7z format supports 256-bit key AES algorithm encryption; the key is obtained by performing the SHA-256 hash algorithm on the password provided by the user.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

7z is a mainstream and efficient compression format with an extremely high compression ratio. In computer science, 7z is an archive format that can use a variety of compression algorithms for data compression. The format was originally implemented and adopted by 7-Zip, but the file format is public and the 7-Zip software itself is open source under the GNU Lesser General Public License (GNU LGPL). The latest version of the LZMA software development kit is V9.34. The MIME type of the 7z format is application/x-7z-compressed.

Usually the 7z format using 7-Zip can be 30-70% smaller than the compressed file using zip format.

And the zip format created with 7-Zip is 2-10% smaller than that created by most other compression software.

Main Features:

• Open source and modular component structure (allows the use of any compression, conversion or encryption algorithm)

• Highest compression ratio

• Powerful AES-256 encryption

• Can change and configure the compression algorithm

• Supports very large files (up to 16EB)

• Unicode file name support

• Supports solid compression, allowing inner classes Files are compressed in a stream, so that similar content is compressed efficiently

• Supports file header compression

• Supports multi-threading The compressed

7z format supports 256-bit key AES algorithm encryption. The key is obtained by performing the SHA-256 hash algorithm on the password provided by the user (using a large number of iterations to make brute force decoding of the password more difficult)

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