Electronic User Authentication Key for Access to HMI/SCADA via Unsecured Internet Networks

Table 2

Software tools for cracking authentication passwords.

Name of the tool	Description
John the Ripper [22, 23]	Uses command line to crack passwords. This makes it suitable for advanced users who are comfortable working with teams. It uses a wordlist to crack passwords. The program is free, but the wordlist is not.
Cain and Abel [24, 25]	Used for password cracking methods: dictionary attack, brute force, and cryptanalysis. Unlike John the Ripper, Cain and Abel uses a graphical user interface.
Ophcrack [25–27]	Is a cross-platform, Windows password cracker that uses rainbow tables to crack passwords. It works on Windows, Linux, and Mac OS. It also has a module for brute force attack attacks among other features.