Can the Contents of Encrypted Archives be Guessed, Based on the Compression of Different File Types?
In other words, can we guess the file format based on the compression ratio? For example, is there a worse compression rate for JPG and a better compression rate for TXT? If compression ratios are visible, you can also see the file format and file names. Users who have sensitive data can enable the "encrypt file names" option and hide both file names and ratios. Unlike many other archive formats, RAR allows users to encrypt not only file data, but also file headers and all meta files.
