Generating a Hash
What Is a Hash?
The MD5 hash (a.k.a. checksum) for a file is a 128-bit value and is
like a fingerprint of the file. There is a very small possibility of getting
two identical hashes of two different files. An MD5 hash is useful both for
comparing the files and their integrity control. The SHA-1 hash is a
160-bit crytographic function.
An MD5 hash (SHA-1 hash is optional) must accompany all zip file submittals.
How to Generate a Hash
- Download Microsoft FCIV from: http://support.microsoft.com/kb/841290
- Place downloaded FCIV.exe application in directory "C:\FCIV"
- Place files (e.g., software and manual, etc.) in a zip (e.g., "Software1.zip")
- Place "Software1.zip" file in directory "C:\FCIV"
- Open Command Prompt, navigate to directory by typing "cd C:\fciv"
- Once in "C:\fciv" directory, Type the following in the Command Prompt
fciv.exe -add C:\FCIV\Software1.zip -both >> C:\FCIV\Hash.txt
- Open the "Hash.txt" file to view and SHA-1 and MD5 hash values.