Viper is a brute force UNIX-style password cracker for passwords encrypted with crypt. It has been developed from Hale's viper 1.4 Perl program.

So, why do we need to learn about password cracking and the tools used to do so? The purpose of password cracking revolves around recovering the forgotten passwords of our online accounts, computers, and smartphones. Password cracking is also used by system administrators as a preventive measure. They keep checking them on the regular basis to look for the weak links. Talking about the process of password cracking, most methods involve the use of a computer that generates a vast set of password candidates. A desktop computer tests more than hundreds of millions of passwords per second.

A password cracking tool performs this task easily and checks these candidates to reveal the actual password. The time needed to crack a password is proportional to the length and strength of that password. That's why users are advised to use complex passwords that are harder to guess. The password cracking speed of a tool also depends heavily on the cryptographic function that's used to generate password hashes. Thus, a potent hashing function like bcrypt is preferred over the likes of SHA and MD5. Types of password cracking attacks: Here's I'll be listing various types of password cracking attacks that are generally used by attackers: • Dictionary attack: This attack uses a file that contains a list of words that are found in the dictionary. This mode matches different combinations of those words to crack your device open.

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• Brute force attack: Apart from the dictionary words, brute force attack makes use of non-dictionary words too. • Rainbow table attack: This attack comes along with pre-computed hashes. Thus, this method is faster. There are lots of other password cracking techniques like phishing, spidering, social engineering, shoulder surfing etc. Soon, I'll be discussing them in detail in another article. So, let's get started with our list of the best password cracking tools of 2016. Best Password Cracking Tools Of 2016: Disclaimer: fossBytes is publishing this list just for educational purposes.

We don't promote malicious and unethical practices. John the Ripper  Best Password Cracking Tools Of 2016 John the Ripper is one of the most popular password cracking tools available around. This free password cracking tool is chiefly written in C programming language. Encompassing a customizable password cracker, John the Ripper comes as a combination of many password crackers into one suite.

Its ability to autodetect password hashtypes, makes it a preferred choice of ethical hackers to ensure security. A pro version of this tool is also available, offering better features and more effectiveness. Just like the popular Metasploit, John also belongs to the Raspid7 family of security tools. Supported platforms: John the Ripper is available for all major platforms, including Linux, Windows, DOS, and OS X. Download link: Aircrack-ng  Best Password Cracking Tools Of 2016 Aircrack-ng ( ng stands for new generation) is one of the best password cracking tools that hackers use to bump their annoying neighbors off their own Wi-Fi. Note that just like John the Ripper, Aircrack-ng is not a single tool. Instead, it's a complete software suite that's used to play with Wi-Fi networks. In this free suite, you get a tool named aircrack that hackers use to crack WPA or WEP passwords.

After analyzing the encrypted password packets, aircrack uses its cracking algorithm to break the passwords. Using the well know attack techniques like FMS, this password cracking tool makes your job easier. Recently, a new attack named 'PTW' has been included in the suite, which reduces the number of initialization vectors to break a WEP key. Supported platforms: Aircrack is available for Linux, OpenBSD, FreeBSD, OX X, Windows, Android Download link: RainbowCrack  Best Password Cracking Tools Of 2016 As the name suggests, RainbowCrack makes use of rainbow tables to crack password hashes. Using a large-scale time-memory trade-off, RainbowCrack performs an advance cracking time computation.