Posts tagged ‘password’

The safest password

Today at work I was forced to change my silly, complicated Windows password: Pas$w0rdX to Pas$w0rdY.
That’s it. I changed one letter and called it a day. And not just any letter. The last letter. And I changed it in the least relevant way. I incremented it by a single bit. Looking at binary representation, this is my password before and after the change:

010100000110000101110011001001000111011100110000011100100110010001011000
010100000110000101110011001001000111011100110000011100100110010001011001

Looks like my network administrator hopes that in case my old password was about to be compromised by a hacker (for example by using the simplest method possible – trying all possible combinations one after another), he/she won’t be able to hack it now. Phew, disaster averted.

This ridiculous waste of time led me to idea: in order to make the hacking as difficult as possible, I will switch to

The Ultimate Safest Password

Of course I could make it idiotically long, but where is the fun in that? Instead, I will use the strongest password that fits in the minimum length, lets say 8 characters.

Looking at the binary representation of my previous and current password, the solution presents itself very easily:
If somebody tries to iterate all possible values, they will (obviously) start from 0 and increment it over and over. Thus, the binary form of the very last password to hack is…
1111111111111111111111111111111111111111111111111111111111111111

This password is guaranteed to be the most difficult 8-letter password to break using the most sophisticated KISS algorithm known to man (exactly 264 = 1.84467441 × 1019 iterations, as opposed to 5.7920372 × 1018 for the old password limited to 8 characters). That’s mind-bogglingly 3.18 times more secure (requires 3.18 x longer time to hack using very brute force).

But wait, there’s more!

Translating to decimal, it’s series of 8 bytes with value 255 (binary 11111111) each.
And now, the ultimatest safety haxx0r. Please turn on the NumLock key on your keyboard, and check the character that the code 255 produces:

First, you need to open Notepad and press and hold Left Alt, and then use the numeric keypad to type the character code. Tablet and Apple users should not apply, they don’t know what a numpad (nor a password) is:

Apple keyboard without numpad

The location of the new, magical Numeric Pad on the current Apple keyboard

Still holding that Alt key? Type 255 on the numeric keypad (while nothing happens) and… release the Alt key.

That’s it! Did you miss it? You just typed it! Code 255 produces an invisible space character!
Now, type it 7 more times.

invisible password in notepad

invisible password in notepad

Now, you can even save it on pendrive or print it and tape it to your desk. Your ultimate password is invisible and secure!

2011-02-10 at 22:07


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