secring and dropbox
Robert J. Hansen
rjh at sixdemonbag.org
Wed Jul 20 03:25:36 CEST 2011
> Using a decent password generator and specifying a mix of upper and
> lower case letters, digits, and special characters, how many total
> characters -- as a minimum -- would you recommend such a password be?
Generate 16 random bytes, base-64 encode them, memorize the output. I use a Python script to generate high-value keys. Works pretty well wherever there's a /dev/random device that can be read. I'm sure there's a way to do it for Windows, but I almost always have a UNIX terminal handy so I haven't bothered. :)
I'm presenting the script here in case someone else finds it useful, but really, it's embarrassingly simple.
# genrandkey -- generates high-randomness 128-bit keys
# Contributed to the public domain.
# Be careful with this script: each time you run it you consume
# sixteen bytes from the system's high-entropy source. Only
# generate random keys when you need them!
# If you need to generate a lot of keys, you may want to use
# /dev/urandom instead. The keys won't quite be of as high
# quality, but should be plenty good enough for almost all
# Usage example:
# proverbs:~ rjh$ ./genrandkey
from base64 import b64encode
with open('/dev/random') as fh:
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