Didier Stevens

Monday 23 March 2009

35 Year Old Puzzle

Filed under: Puzzle — Didier Stevens @ 17:26

Here’s a 25 35 year old puzzle (it’s not mine). I’m curious if you’ll find the solution without using Google.

First one to post a comment with the solution gets a sticker (and I’ll have “PDF – Penetration Document Format” stickers soon). But play fair and don’t post your solution if you just Googled the bit sequence.

00000010101010000000000001010000
01010000000100100010001000100101
10010101010101010101001001000000
00000000000000000000000000000001
10000000000000000000110100000000
00000000000110100000000000000000
01010100000000000000000011111000
00000000000000000000000000000110
00011100011000011000100000000000
00110010000110100011000110000110
10111110111110111110111110000000
00000000000000000001000000000000
00000100000000000000000000000000
00100000000000000000111111000000
00000001111100000000000000000000
00011000011000011100011000100000
00100000000010000110100001100011
10011010111110111110111110111110
00000000000000000000000001000000
11000000000100000000000110000000
00000000100000110000000000111111
00000110000001111100000000001100
00000000000100000000100000000100
00010000001100000001000000011000
01100000010000000000110001000011
00000000000000011001100000000000
00110001000011000000000110000110
00000100000001000000100000000100
00010000000110000000010001000000
00110000000010001000000000100000
00100000100000001000000010000000
10000000000001100000000011000000
00110000000001000111010110000000
00001000000010000000000000010000
01111100000000000010000101110100
10110110000001001110010011111110
11100001110000011011100000000010
10000011101100100000010100000111
11100100000010100000110000001000
00110110000000000000000000000000
00000000001110000010000000000000
01110101000101010101010011100000
00001010101000000000000000010100
00000000000011111000000000000000
01111111110000000000001110000000
11100000000011000000000001100000
00110100000000010110000011001100
00000110011000010001010000010100
01000010001001000100100010000000
01000101000100000000000010000100
00100000000000010000000001000000
00000000100101000000000001111001
111101001111000

7 Comments »

  1. I took the bits and put them in a text file, stripped the newlines and counted the number of bits. 1679. Odd number. The combination of 2 primes, 23 and 73. 1679 is a little off to convert to bytes. I reorganized the sequence in rows of 23 characters each and got the following (substituting 0/. and 1/@):

    ......@.@.@.@..........
    ..@.@.....@.@.......@..
    @...@...@...@..@.@@..@.
    @.@.@.@.@.@.@.@..@..@..
    .......................
    ............@@.........
    ..........@@.@.........
    ..........@@.@.........
    .........@.@.@.........
    .........@@@@@.........
    .......................
    @@....@@@...@@....@@...
    @.............@@..@....
    @@.@...@@...@@....@@.@.
    @@@@@.@@@@@.@@@@@.@@@@@
    .......................
    ...@.................@.
    .......................
    ....@.................@
    @@@@@.............@@@@@
    .......................
    @@....@@....@@@...@@...
    @.......@.........@....
    @@.@....@@...@@@..@@.@.
    @@@@@.@@@@@.@@@@@.@@@@@
    .......................
    ...@......@@.........@.
    ..........@@...........
    ....@.....@@..........@
    @@@@@.....@@......@@@@@
    ..........@@...........
    ..@........@........@..
    ...@......@@.......@...
    ....@@....@@......@....
    ......@@...@....@@.....
    ..........@@..@@.......
    ......@@...@....@@.....
    ....@@....@@......@....
    ...@......@........@...
    ..@.......@@........@..
    .@........@@........@..
    .@.........@.......@...
    ..@.......@.......@....
    ...@............@@.....
    ....@@........@@.......
    ..@...@@@.@.@@.........
    ..@.......@............
    ..@.....@@@@@..........
    ..@....@.@@@.@..@.@@.@@
    ......@..@@@..@..@@@@@@
    @.@@@....@@@.....@@.@@@
    .........@.@.....@@@.@@
    ..@......@.@.....@@@@@@
    ..@......@.@.....@@....
    ..@.....@@.@@..........
    .......................
    ..@@@.....@............
    ..@@@.@.@...@.@.@.@.@.@
    ..@@@.........@.@.@.@..
    ..............@.@......
    ........@@@@@..........
    ......@@@@@@@@@........
    ....@@@.......@@@......
    ...@@...........@@.....
    ..@@.@.........@.@@....
    .@@..@@.......@@..@@...
    .@...@.@.....@.@...@...
    .@...@..@...@..@...@...
    .....@...@.@...@.......
    .....@....@....@.......
    .....@.........@.......
    .......@..@.@..........
    .@@@@..@@@@@.@..@@@@...

    Looks like a man in the center. Googled 1679 bits and found the Arecibo Message (need to reverse each line apparently). This was apparently 35 years ago, 1974, not 25 years ago.

    Comment by WarDog — Monday 23 March 2009 @ 20:24

  2. Nice solution.

    Wikipedia has more details about the Arecibo message http://en.wikipedia.org/wiki/Arecibo_message

    Do you think you would understand this picture? I wonder what I would make of such a picture I would get from aliens.

    And thanks for the correction, it was 35 years ago.

    Comment by Didier Stevens — Monday 23 March 2009 @ 21:25

  3. To be honest, I doubt I would get it at all. I would get to the point of seeing that it’s not just random bits and see the pictures but beyond that I would definitely need some outside help. All the basic elements seem somewhat logical enough though.

    Comment by WarDog — Tuesday 24 March 2009 @ 3:01

  4. [...] 35 Year Old Puzzle – Didier Stevens ‘ Here’s a 35 year old puzzle (it’s not mine). I’m curious if you’ll find the solution without using Google ‘ Warning: the solution is already in the comments, so be careful if you want to give it a serious go for yourselves [...]

    Pingback by Arjan`s World » LINKBLOG for March 24, 2009 — Tuesday 24 March 2009 @ 20:57

  5. ascii pr0n?

    Comment by iamnowonmai — Friday 27 March 2009 @ 12:19

  6. @iamnowonmai LOL! Nice one!

    Comment by Didier Stevens — Friday 27 March 2009 @ 15:01

  7. Funnily enough, I just found your quizz page by googling 00000010101010000000000001010000
    I miss Fravia.

    Flynn

    Comment by Anonymous — Wednesday 29 February 2012 @ 22:51


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