YOSPOS Cryptography Challenge (win a prize)

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > YOSPOS > YOSPOS Cryptography Challenge (win a prize)

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hobbesmaster: Jan 28, 2008

Bloody posted:

i dont have matlab at home so idk what to do now

octahahahhahahah

# ? Mar 7, 2015 16:36

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# ? May 16, 2024 00:35

Bloody: Mar 3, 2013

ahmeni posted:

if there's one thing I've learned from this challenge it's that ipython notebooks bokeh integration is a colossal turd and so is their documentation

this man. he shavin him yak.

# ? Mar 7, 2015 16:49

Lain Iwakura: Aug 5, 2004; The body exists only to verify one's own existence.; Taco Defender

sort of impressed that this has gone almost a whole day now

# ? Mar 7, 2015 18:01

oh no blimp issue: Feb 23, 2011

OSI bean dip posted:

sort of impressed that this has gone almost a whole day now

i totally deciphered it ages ago im just letting everyone else have a go

yeah

# ? Mar 7, 2015 18:52

sleepy gary: Jan 11, 2006

OSI bean dip posted:

sort of impressed that this has gone almost a whole day now

I guess rolling your own crypto isn't such a bad idea after all

# ? Mar 7, 2015 20:00

Subjunctive: Sep 12, 2006; ✨sparkle and shine✨

Displeased Moo Cow posted:

it's a naked man bending over and stretching out his rear end in a top hat.

no ring (or group, or field)

# ? Mar 7, 2015 20:08

OldAlias: Nov 2, 2013

a whole bunch of arabic that i can't read

# ? Mar 7, 2015 20:10

Flat Daddy: Dec 3, 2014; by Nyc_Tattoo

i should spoiler my post on p1

# ? Mar 7, 2015 20:45

Bloody: Mar 3, 2013

i bet the joke is that the op ciphertext is an esoteric substitution cipher of a pgp ciphertext

# ? Mar 7, 2015 20:51

suffix: Jul 27, 2013; Wheeee!

ooh. so frequency analysis, 60 different bytes, upper nibble 0-9, lower nibble a-f
there's 10 values that are noticeably more common than the rest, with roughly even frequency. one of these values for each upper nibble group

if this was a substitution cipher i'd think that there's a large random decimal number in there, and the most common values are digits,
but there's no large block of just those values so that looks like a dead end

the non-top10 values have differing frequencies, but not really english text like - 67 of the most common and 17 of the least

there's various ways to map the values to the 0-60 range, but as long as you're just looking at bytes that's just specific ways to do substitution ciphers, which isn't looking too promising
probably the odd-even pattern means the next step should be to look at byte pairs, or take odd and even bytes separately

# ? Mar 7, 2015 21:20

Qtotonibudinibudet: Nov 7, 2011; Omich poluyobok, skazhi ty narkoman? ya prosto tozhe gde to tam zhivu, mogli by vmeste uyobyvat' narkotiki

it says 'yospos, bithc'

# ? Mar 7, 2015 23:03

EMILY BLUNTS: Jan 1, 2005

try treating it as a bitmap/imagemap. not sure how or in what way, just a thought.

# ? Mar 7, 2015 23:07

Bloody: Mar 3, 2013

when saved as a windows executable, it fails to run

# ? Mar 7, 2015 23:14

Wheany: Mar 17, 2006; Spinya^{ha^{ha^haha}ha}ha_{ha_{ha_haha}ha}ha!; Doctor Rope

it's an mp3 inside a tar.gz, and it's the soundtrack from the yospos instructional video

# ? Mar 7, 2015 23:16

Bloody: Mar 3, 2013

poo poo i never thought i'd say: i wish i had matlab installed on my computer

# ? Mar 7, 2015 23:22

DONT THREAD ON ME: Oct 1, 2002; by Nyc_Tattoo; Floss Finder

it says yospos bicth

to decode it i used social engineering

# ? Mar 7, 2015 23:26

vodkat: Jun 30, 2012; cannot legally be sold as vodka

I, too, will offer some other nerd on another internet forum a 50 CAD amazon gift certificate to crack this problem.

# ? Mar 7, 2015 23:27

Bloody: Mar 3, 2013

suffix posted:

ooh. so frequency analysis, 60 different bytes, upper nibble 0-9, lower nibble a-f
there's 10 values that are noticeably more common than the rest, with roughly even frequency. one of these values for each upper nibble group

if this was a substitution cipher i'd think that there's a large random decimal number in there, and the most common values are digits,
but there's no large block of just those values so that looks like a dead end

the non-top10 values have differing frequencies, but not really english text like - 67 of the most common and 17 of the least

there's various ways to map the values to the 0-60 range, but as long as you're just looking at bytes that's just specific ways to do substitution ciphers, which isn't looking too promising
probably the odd-even pattern means the next step should be to look at byte pairs, or take odd and even bytes separately

that pattern kind of resembles ebcdic but it isnt ebcdic

# ? Mar 7, 2015 23:32

maniacdevnull: Apr 18, 2007; FOUR CUBIC FRAMES
DISPROVES SOFT G GOD
YOU ARE EDUCATED STUPID

ymgve posted:

quick observations:

upper nibble is always 0-9
lower nibble is always a-f

for bytes in even positions, lower nibble is always a-c
for bytes in odd positions, lower nibble is always d-f

there's some pattern in the lower bit of the upper nibble that seems to connect to the odd/even thing somehow

but havent managed to get anything that doesn't look like noise once the redundancies are eliminated

here's an observation for you: you suck.

# ? Mar 8, 2015 00:01

Squinty Applebottom: Jan 1, 2013

if you can't break it just get a secret court order and force him to tell you what it means imo

# ? Mar 8, 2015 00:42

NoneMoreNegative: Jul 20, 2000; GOTH FASCISTIC
PAIN MASTER

shit wizard dad

Squinty Applebottom posted:

if you can't break it just get a secret court order and force him to tell you what it means imo

rubber hose cryptography ftw

# ? Mar 8, 2015 00:47

ahmeni: May 1, 2005; It's one continuous form where hardware and software function in perfect unison, creating a new generation of iPhone that's better by any measure.; Grimey Drawer

OSI bean dip posted:

sort of impressed that this has gone almost a whole day now

# ? Mar 8, 2015 02:19

theadder: Dec 30, 2011

ahmeni posted:

lol

# ? Mar 8, 2015 02:19

stoutfish: Oct 8, 2012; by zen death robot

it's your posting op

# ? Mar 8, 2015 02:23

Winkle-Daddy: Mar 10, 2007

OSI bean dip posted:

sort of impressed that this has gone almost a whole day now

sort of impressed you thought the average yosposters attention span is longer than the time it takes him ~~or her~~ to press ctrl+v

# ? Mar 8, 2015 04:22

ahmeni: May 1, 2005; It's one continuous form where hardware and software function in perfect unison, creating a new generation of iPhone that's better by any measure.; Grimey Drawer

i have no idea what im doing

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# ? Mar 8, 2015 05:42

ahmeni: May 1, 2005; It's one continuous form where hardware and software function in perfect unison, creating a new generation of iPhone that's better by any measure.; Grimey Drawer

i have no loving idea for crypto but the colours line up at the 40 pixel width ratio and thats kind of neat

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# ? Mar 8, 2015 05:50

Bloody: Mar 3, 2013

ahmeni posted:

i have no idea what im doing

you made a missingno

# ? Mar 8, 2015 05:52

poty: Jun 21, 2008; 虹はどこで終わるのですか？あなたの魂の中で、または地平線で?

Bloody posted:

that pattern kind of resembles ebcdic but it isnt ebcdic

who is eb and how can she c my dic

# ? Mar 8, 2015 07:38

cowboy beepboop: Feb 24, 2001

ahmeni posted:

lol

# ? Mar 8, 2015 09:39

Wheany: Mar 17, 2006; Spinya^{ha^{ha^haha}ha}ha_{ha_{ha_haha}ha}ha!; Doctor Rope

ahmeni posted:

i have no loving idea for crypto but the colours line up at the 40 pixel width ratio and thats kind of neat

i see a blonde, a brunette and a redhead

# ? Mar 8, 2015 09:40

emoji: Jun 4, 2004

pointsofdata posted:

It's a low res gif if the goatman

s=$(echo H4sIAEMi/FQAA4WVYZLsIAiEr5R9iW78iZXk/kd6QNPKOLO7Q1WSUfxswJDybz9o5aml3LBazmZWbtzD HrV46nvfOV6LrnzsOmkvvIc83hPPif0wyzxcX3lqSttl6ou7qOm9bUnjo8R98mAL7yaPChd9n2MfvF3I +tr2g9E6T4kzkmxtM0O8/XDF4NXyGCXzQNRdJGoik2hrnSFkJaaotm6rcrzk+ahMhcw+7TpXYlRGd3/j RUVAZISxqlxNLWhyL7s8lxJXnil03TpDHhUq64Gt6ny02Tizx/yZwuBJYf3EtLi2Bpafn2GqO/a52jsP CqGPlZAL8VynRZtYu9NazLXJm/GSh0yS52tO8Cx38g07m9zB82x80ofTYqcgItZ4I0NOU1VhcpWbc72Y cpDW/BlRq1p6YU2gb5wN8r4t4ovV0ruRYLtkXi3Gux7WJFdT7qlQLSK13aHvlee10Gc/b4kXKs7gtVGT liueeMc7r49317LOE6g88dlB8dwcluefecifr0wnxKqUtC20H/UdzlMNbYMyMGtFJxndxkZqZq88r8YR +vydhULbGzzvjDJoZfJM58pDtFiDPmdXrvB+YTUiz/+TaJ6/8eABJmne5zp7t0bS/TtUP8fLaOEDL+rz 2e7zYNh/9TX6zOLfPOQ85fYwAuKOvhHe5v/Ki/0le5BmIzpvvaNbhd2jrP5vvAMxWJbHD1mP7xd4PDkr MfNGPJivseegkfe12ahl1KZDQ9TlF150h6gCjL2tI39TNYkLr0d3Ffrb6cjfGPTeqEXsnZ48E+x/5EGf k6ayaeo9POf3LJ7+A55epN5gCQAA|sed 's/ //g'|base64 -$(if [ `uname` == "Darwin" ];then echo D;else echo d;fi)|gunzip);tput rev;for i in $(seq 0 2 $((${#s}-1)));do tput setaf $(printf '%d' 0x${s:i:2});echo -n ' ';done;echo;tput sgr0

# ? Mar 8, 2015 11:42

jony ive aces: Jun 14, 2012; designer of the lomarf car; Buglord

poty posted:

how can she c my dic

~~very caref~~ with a microscope :xd:

# ? Mar 8, 2015 11:57

jony ive aces: Jun 14, 2012; designer of the lomarf car; Buglord

re: image encoding and stuff, i don't think it is idk

OSI bean dip posted:

I'll provide a hint here: it is human readable

but don't let that stop you

# ? Mar 8, 2015 11:59

Lain Iwakura: Aug 5, 2004; The body exists only to verify one's own existence.; Taco Defender

jony ive aces posted:

re: image encoding and stuff, i don't think it is idk

but don't let that stop you

It is not an image

# ? Mar 8, 2015 17:24

Lain Iwakura: Aug 5, 2004; The body exists only to verify one's own existence.; Taco Defender

Upping the stakes here: $50 CAD amazon gift card for whatever country you want if you decipher it.

# ? Mar 9, 2015 01:01

emoji: Jun 4, 2004

Nobody cares about the money. Pretty much every one here makes a descent salary so the gift card is inconsequential. You'll get more people attempting it if the prize is something gay like a picture of your balls.

# ? Mar 9, 2015 01:22

ahmeni: May 1, 2005; It's one continuous form where hardware and software function in perfect unison, creating a new generation of iPhone that's better by any measure.; Grimey Drawer

amazon is basically garbage in aus anyways lol
I think the main problem is other than statistical analysis there isn't much the common yosposter can really do and it's not a fun cipher like vigenere is or anything (maybe?)

# ? Mar 9, 2015 02:24

Constant Hamprince: Oct 24, 2010; by exmarx; College Slice

emoji posted:

Nobody cares about the money. Pretty much every one here makes a descent salary so the gift card is inconsequential. You'll get more people attempting it if the prize is something gay like a picture of your balls.

just make the plaintext a picture of ur gay balls

# ? Mar 9, 2015 03:31

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# ? May 16, 2024 00:35

pram: Jun 10, 2001

ahmeni posted:

# ? Mar 9, 2015 05:41

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > YOSPOS > YOSPOS Cryptography Challenge (win a prize)

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