How do you generate passwords? [closed]

Question

How do you generate passwords?

• Random Characters?
• Passphrases?
• High Ascii?

Something like this?

cat /dev/urandom | strings

Answer 1

On a Mac I use RPG.

Answer 2

Password Monkey, iGoogle widget!

Answer 3

Pick a strong master password how you like, then generate a password for each site with cryptohash(masterpasword+sitename). You will not lose your password for site A if your password for site B gets in the wrong hands (due to an evil admin, wlan sniffing or site compromise for example), yet you will only have to remember a single password.

Answer 4

The standard UNIX utility called pwgen. Available in practically any unix distribution.

Answer 5

You will have to code extra rules to check that your password is acceptable for the system you are writing it for. Some systems have policies like "two digits and two uppercase letters minimum" and so on. As you generate your password character by character, keep a count of the digits/alpha/uppercase as required, and wrap the password generation in a do..while that will repeat the password generation until (digitCount>1 && alphaCount>4 && upperCount>1), or whatever.

Answer 6

I generate random printable ASCII characters with a Perl program and then tweak the script if there's extra rules to help me generate a more "secure" password. I can keep the password on a post-it note and then destroy it after one or two days; my fingers will have memorized it, and my password will be completely unguessable.

This is for my primary login password, something I use every day, and in fact many times a day as I sit down and unlock my screen. This makes it easy to memorize fast. Obviously passwords for other situations have to use a different mechanism.