• Click here to download the Windows version.
  This version is a self-extracting one with name SHA_Release.exe.
  1. Download this file to a selected directory and run it by double-clicking on its icon.
  2. This program will run, create a directory SHA-Release, and save all files to this directory.
  3. Double-click the program SHA to run it.
• Click 64-bits or 32-bits to download the Linux version. This version is a standard Unix tar.gz files with filename SHA.tar.gz
  1. Download this file to a selected directory.
  2. The standard Unix way to uncompress and untar this file is to run the following commands

     gzip -d *.gz; tar xvf *.tar
     

  3. A binary executable SHA will be created in the selected directory. This is the SHA Visualization program.
• Click here to download the MacOS version.
  This version is a standard zip file with name SHA.zip. However, the MacOS version requires some extra work to be installed properly.
  1. Download this file to a selected directory.
  2. If you are using an Unix based machine, run the following command

     unzip *.zip
     

     This will create several directories. The RSA Visualization software is in SHA.app/Contents/MacOS/SHA
  3. If you are using a MacIntosh machine, doulbe click the zip file and this will create an executable SHA.
  4. However, you need one more step because the Qt library is not provided. The package can be downloaded from the following link (recommended): http://download.qt-project.org/archive/qt/4.8/4.8.4/qt-mac-opensource-4.8.4.dmg.

User Guide

Run SHA from the installation directory. Two window show up. "Globalview" window shows the overview workflow for SHA and highlights the current step for demo mode. "SHA" main window has several pages as follows:

Demo Mode Page

This page shows a simplifed version of SHA encryption with message block length equal to 256 bits.

"Message generation" demonstrates how an original message is converted to the augumented message. Clicking the augumented message leads you to "overview" sub-page. To start the demo, click the "random message" button to generate an original message.

"Overview" shows how the augumented message is divided into blocks. Clicking each block leads you to the corresponding "words generation" sub-page. Clicking "compression function" button shows the corresponding compression function.

"Words generation" shows all 80 words generated from the corresponding block. "RotShift" buttons show the detail operations for the input words.

"Compression function" demonstrates the workflow of the selected compression function. Only one round is shown for demonstration purpose. Clicking "round0" button shows the round details.

"Round" provides the detail information for the corresponding round.

Practice Mode Page

This page allows you to practice the calculation of SHA encryption with the same message length in demo mode. Click "start practice" button and the "practice window" pops up.

To show the answer for each question, press "show ans", so that the answer will be automatically filled in.

Page switching is disable during practicing.

Click "quit" to leave the practice mode.

Full Mode Page

This page provides a full version of SHA encryption with block length equal to 1024 bits.

There are two ways to generate input messages: clicking "random" or typing text in the "input message" field.

Click "confirm" button to run SHA on your input.