AES-256 encrypted zip files are the only reason I use 7z from the
command line instead of File Roller.  File roller should at least tell
you what encryption it is using.  The original .zip encryption is a joke
by today's standards.  I had to install 7z just to figure out what
encryption file-roller/zip was actually using (AES-128 on Ubuntu 12.04).

Here is a short script for running 7z with AES-256 without typing your
password on the command line (and thus entering it into the history):

read -s -p "Please enter a password: " backup_pass
backup_pass="'"$backup_pass"'"

7z a -tzip -p$password -mem=AES256 destFile.zip folderOrFileName

unset backup_pass

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https://bugs.launchpad.net/bugs/220654

Title:
  file-roller will not open 256 AES zip files

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