Explorers of the Deep - 2021-09-25 (page 2 of 2)

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Euler 2

17:01

@Wolgwang everything is binary. Every. single.thing

for example, consider this image:

save it to your computer, right click and select 'open with notepad'

you see some weird things?

run this command in a shell:

$ strings <the file name you saved it with>.jpg >> data.txt

then open the file 'data.txt'

if you want to hide some message in an image, run this command:

$ echo "your message here" >> "file name here".png/jpg/any other image file format

it will hide the data in that image

open that image in a text editor, go to the bottom, there is the message

@RajdeepSindhu indeed, in the original source code (c code) and the 1st layer of python code, the obfuscation was done by me, but in the second layer of python obfuscation and the js obfuscation were done by an external utility

and playing with that raw data in interesting
sometimes it results in glitches, sometimes it corrupts the file (and the second one is more frequent of course)

actually an image itself is not a program

it is just the raw data

when we click on an image, the os opens the software we set as default to open such files, and it reads the binary bits
you know this probably

@Wolgwang the raw binary code contains many weird characters, this just outputs all the strings which don't contain nonsensical chars (good for analysis)

Wolgwang

@Euler2 How to open shell?

Euler 2

open cmd

and don't type the dollar signs

Wolgwang

17:17

How to change the location?

I mean path

Euler 2

cd command

Wolgwang

C:\Users\oler>

Euler 2

cd desktop

goes to desktop

Wolgwang

@Euler2

`'$' is not recognized as an internal or external command,
operable program or batch file.`

Euler 2

don't write the dollar signs

they are just the '>' equivalents for unix type shells

Wolgwang

17:19

@Euler2 this is png

Euler 2

so then write .png rather than .jpg

@RajdeepSindhu partially true. It contains both metadata and binary representations of pixels. The binary representation of colors is called 'bit plane'

Bit plane

A bit plane of a digital discrete signal (such as image or sound) is a set of bits corresponding to a given bit position in each of the binary numbers representing the signal.For example, for 16-bit data representation there are 16 bit planes: the first bit plane contains the set of the most significant bit, and the 16th contains the least significant bit. It is possible to see that the first bit plane gives the roughest but the most critical approximation of values of a medium, and the higher the number of the bit plane, the less is its contribution to the final stage. Thus, adding a bit plane...

Wolgwang

'strings' is not recognized as an internal or external command,
operable program or batch file.

Euler 2

I think you should try cygwin (unix like shell for windows) because i don't know if strings commands works in cmd

the output is something like this, if you don't have time for that

Arjun

@Wolgwang and

Euler 2

JFIF
(((Z
(P(((
h(((
((P((
((((P((
((P((
(((Z
((((
((((
((((
(((Z
((((
((((
(((Z
((((
((((
((P((
((P((
((((
((((
((((
(((Z
(((Z
((((
((((
((((
(P((
((((
((P(((
@(P((
((((
((((
(P(((
((((
h(((
h((q
(((Z
((((
(P(((
(((Z
((((
((((
h@(P((
((((
((((
(((Z
(P((
((P((
(((Z
(P(((
h(((
Ah@P
((P((
(P(((
((((
((((
A(P(((
((((
((((
(P((((
((((
(((Z
((((
(P(((
((P((
(P((
((((
(P((((
((((
((((
((((
P((((
(P(((
ryx(
((P((ryp(
((P((
((P(ryx
h@P((4
(((Z
((((
((((
(((Z
((((
((((
((P(
(((r
(P(((
((((
((((
(P((
((((

Wolgwang

17:26

@Arjun I will ask it tomorrow. It is a long question...

in Mathematics, 5 mins ago, by Wolgwang

How can I choose the parametric coordinates of a parabola?

Arjun

@Euler2 wait a min

Wolgwang

@Arjun Rick????

Euler 2

I found that image somewhere

Arjun

@Wolgwang at^2 ,2at somethin?

@Wolgwang astey

Wolgwang

Arjun

17:29

@Wolgwang don't they teach anything :/

Wolgwang

@Arjun :-/

Arjun

What books u doin?

Math

Wolgwang

@Arjun NCERT, FIITJEE module, 2003-2018 mains archive.

Arjun

@Wolgwang abe saale

Book to krle koi

Wolgwang

@Arjun Time nhi milta re :-/

Arjun

17:32

@Wolgwang ncert aur archive chid abhi

Koi book krle

Wolgwang

@Arjun Archive kyu?

Arjun

Usme to purane saal ke h bs

Vo to book me bhi mil jaayege

Book karega tbhi kuch faida hoga varna latak jaayega :)

drive.google.com/file/d/13vM_nwuxFzxDOdPzGMHIOhSxfBrrcn-O/…

See this

On page 5 of the chapter

Your question

By book i mean a text book

Cengage is impressive

Many questions of high level

Wolgwang

@Arjun Can you send amazon link?

@Arjun Does it come in black ?

Arjun

@Wolgwang green usually

Wolgwang

@Arjun I will skip the module as questions are not arranged in right order. Kahin difficult kahin easy :-/

Arjun

17:43

Vo tumhe dekhna h

G Tewani

Wolgwang

Arjun

Cengage

@Wolgwang 😒

Wolgwang

@Arjun amazon.in/dp/9390555485

Arjun

Yes

Psf bhi milta h vaise to 😉

Book le lo to bdhiya h

Last tak kaam aayegi

Wolgwang

@Arjun Tune hi pdf bheja tha tab book khirdne ki nhi keh sakta tha -.-

@Arjun Solution ya hints h kya isme?

Arjun

17:46

@Wolgwang tab kahan pata tha ki tu bina book ke hi chale jara h🤡

@Wolgwang both ig, solution to h pakka

Q itne h puch mt

Wolgwang

Jabhi mein sochu itne mehnat toh kar rha hoon maths mein number kyu nhi aa rhe.

Arjun

@Wolgwang jab tune bataya ki book nahi karta

Mere man se awaz aai

Bsk

😂😂

Wolgwang

@Arjun Oops I am 1hr 18mins late.

See ya!

@Arjun XD

Arjun

Me too

5 hours later…

Rajdeep Sindhu

22:42

@Euler2 Triggered SJW noises

@Euler2 I don't think this works for cmd or powershell ._.

@Euler2 Wait, where did C come in here from? ._.

btw, if you wanna change the path to something that doesn't have the same, uh, "first" part of it's directory as the current directory...like from c:\users\username to e:\files...then use this instead :

cd /d e:\files

@Euler2 Why it blecc and whaite bro? ._.

Shouldn't a colourized version be possible? I mean, it'll take three times or so more size but...

@Euler2 why the weird stuff tho?

@Arjun DID YOU JUST NOT IDENTIFY FIITJEE MODULES AS A BOOK?