passphraseme 0.1.5

Description:

passphraseme 0.1.5

passphraseme
A quick and simple cryptographically secure script to generate high entropy passphrases using the Electronic Frontier Foundation's wordlists, including their fandom-inspired wordlists.
Installation
pip3 install passphraseme

Usage
Run passphraseme with a number to generate secure passphrases using EFF's short wordlist, like this:
$ passphraseme 7
plug-scan-skate-shown-ritzy-self-bud
$ passphraseme 5
drank-amino-spoil-badge-copy

You can also optionally choose a different wordlist. Here are all of the command line arguments:



Short
Long
Description




-h
--help
show help message



--sep
Separator (default "-")


-l
--large
Use EFF's general large wordlist


-s1
--short1
Use EFF's general short wordlist (default)


-s2
--short2
Use EFF's short wordlist with unique prefixes


-got
--game-of-thrones
Use EFF's Game of Thrones wordlist (Passwords of Westeros)


-hp
--harry-potter
Use EFF's Harry Potter wordlist (Accio Passphrase!)


-st
--star-trek
Use EFF's Star Trek wordlist (Live Long and Passphrase)


-sw
--star-wars
Use EFF's Star Wars wordlist (The Passphrase Is Strong With This One)


-d [dictionary]
--dictionary [dictionary]
Custom wordlist filename



For example, you can choose to EFF's short wordlist with unique prefixes like this:
$ passphraseme -s2 5
leftover-human-podiatrist-clergyman-elk

Or you can embrace your inner nerd and use a fandom wordlist:
$ passphraseme --game-of-thrones 5
skull-putting-twenty-aid-bluntly
$ passphraseme --harry-potter 5
summoning-jealous-loads-somehow-unregistered
$ passphraseme --star-trek 5
destroying-maximum-radiation-yells-causes
$ passphraseme --star-wars 5
duels-zett-rock-silenced-blockade

You can also choose to use a custom wordlist, like this:
$ passphraseme -d /usr/share/dict/words 7
Sphinx's-congas-adjudge-revalue-scotched-decapitations-scampered

And if you prefer, you can use a custom separator, like or . instead of -:
$ passphraseme --sep " " 5
drown elder drown sport hula
$ passphraseme --sep . 5
stage.stash.speak.shack.pound

Strength of passphrases
This table shows the strength (bits of entropy) of passphraseme-generated passphrases of different lengths (1-10 words).




Bits of entropy/word
1
2
3
4
5
6
7
8
9
10




EFF large wordlist (default)
12.925
12.9 (0 s)
25.8 (0 s)
38.8 (0 s)
51.7 (1 h)
64.6 (1 y)
77.5 (10.6k y)
90.5 (82M y)
103.4 (642B y)
116.3 (4.99e15 y)
129.2 (3.88e19 y)


EFF short wordlists
10.339
10.3 (0 s)
20.7 (0 s)
31.0 (0 s)
41.4 (4 s)
51.7 (1 h)
62.0 (83 d)
72.4 (295 y)
82.7 (382.3k y)
93.1 (495M y)
103.4 (642B y)


EFF fandom wordlists
11.965
12.0 (0 s)
23.9 (0 s)
35.9 (0 s)
47.9 (6 m)
59.8 (17 d)
71.8 (196 y)
83.8 (787.1k y)
95.7 (3B y)
107.7 (1.26e13 y)
119.7 (5.04e16 y)



The brute force time is calculated like this:
I'm assuming you're using a passphrase for macOS 10.8+ (PBKDF2-SHA512) to
encrypt your disk with FileVault. According to this post,
the password cracking tool hashcat can guess
193,900 passphrases per second on an Amazon AWS p3.16xlarge instance, which
costs $24.48 per hour.
If an attacker is willing to spend up to $1 billion per day to guess your
passphrase, they can afford to run 1.7 million of these AWS instances at once,
meaning they can guess ~330 billion passphrases per second. On average, a brute
force attack will find the passphrase after searching half the keyspace, so the
times above are how long it takes to search half the keyspace.
Note that the time "3.88e19 y" means "3.88 x 1019 years". Also note
that the brute force times will vary wildly, both much quicker or much slower,
depending on the hash function or KDF
used -- basically, depending on what software you're using this passphrase with.
Check out calc_passphrase_strength.py to
see the maths.
Licenses
The wordlists included were created by Electronic Frontier Foundation, and are
distributed under the Creative Commons Attribution 3.0. For the fandom wordlists
(Game of Thrones, Harry Potter, Star Trek, and Star Wars), EFF notes that "Any
trademarks within the word list are the property of their respective trademark
holders, who are not affiliated with the Electronic Frontier Foundation and do
not sponsor or endorse these passwords."