DicewareGen

DicewareGen is a secure passphrase generator utilizing Diceware wordlists (http://world.std.com/~reinhold/diceware.html). DicewareGen utilizes Javas SecureRandom class for choosing words from wordlist (https://docs.oracle.com/javase/8/docs/api/java/security/SecureRandom.html).

Javas SecureRandom provides a cryptographically strong random number generator. In this application it uses /dev/urandom on Linux systems.

DicewareGen provides five distinctive wordlists for passphrase generation. Included are four English wordlists and one Finnish wordlist.

English wordlists include (http://world.std.com/~reinhold/diceware.html):

• Original Diceware wordlist by Arnold Reinhold(CC-BY),
• Diceware wordlist 8k version by Arnold Reinhold(CC-BY) and
• Diceware wordlist which "contains fewer Americanisms and obscure words" by Alan Beale(CC-BY?)

They also include (https://www.eff.org/deeplinks/2016/07/new-wordlists-random-passphrases):

• Diceware wordlist which contains words easier to remember and spell, by EFF

Finnish wordlist (http://users.ics.aalto.fi/kaip/noppaware/):

• Noppaware, by Kai Puolamäki(GNU GPL)

Usage

To use DicewareGen you should clone the repository by:

git clone git://github.com/akiutoslahti/DicewareGen.git

After changing to DicewareGen directory, you can create secure passphrases with command:

java DicewareGen

To print help, which instructs of using arguments, use command:

java DicewareGen help

Contents of help included also here:

DicewareGen 1.1, wordlist based passphrase generator
Usage:
    java DicewareGen [wordlist]
    java DicewareGen [wordlist] [pp_length]
    java DicewareGen [wordlist] [pp_length] [pp_count]

Arguments:
    wordlist,	possible wordlists:
        en -> Diceware wordlist, by Arnold Reinhold
        en_8k -> Diceware wordlist 8k, by Arnold Reinhold
        en_beale -> Diceware wordlist, edited by Alan Beale
        en_eff -> Diceware wordlist, by EFF (2016)
        fi -> Finnish Diceware(Noppaware) wordlist, by Kai Puolamäki
    pp_length,	passphrase length as wordcount
    pp_count,	number of passphrases to be generated

Default (no arguments):
    wordlist: en
    pp_length: 6
    pp_count: 10

Other

TrimWordlist.java is used for trimming Diceware numbers from diceware lists. To use it to trim diceware lists, you must edit static Strings SEPARATOR and WORDLIST, to correspond to separator used in wordlist and wordlists path.