HideToSee added

Author: DanArmor

Cryptography/HideToSee/1.jpg

@@ -0,0 +1,33 @@
+# HideToSee #
+ 
+## Overview ##
+ 
+100 points
+ 
+Category: [Cryptography](../)
+ 
+Tags : `#picoCTF 2023` `Cryptography`
+ 
+## Description ##
+
+How about some hide and seek heh?
+
+Look at this image [here](https://artifacts.picoctf.net/c/238/atbash.jpg). 
+ 
+## Solution ##
+
+Download the image. It looks like this:
+
+![Screenshot of the image](1.jpg)
+
+Also it has name `atbash.jpg`.
+
+Extract hidden data with `steghide` (no passphrase):
+
+![Screenshot of the shell](2.jpg)
+
+The name of the file `atbash.jpg` - is a hint to encoding algorithm being used for flag.
+
+[Let's decode it](https://www.dcode.fr/atbash-cipher).
+
+![Screenshot of the decoding](3.jpg)

Cryptography/HideToSee/2.jpg

@@ -12,6 +12,8 @@ This event writeup is a work in progress
 
 I will describe, how to solve some challenges, that are not presented in [this repo](https://github.com/snwau/picoCTF-2023-Writeup), that was original inspiration for creating my own writeup repo.
 
+* Cryptography
+  * **[HideToSee](Cryptography/HideToSee/HideToSee.md)**
 * Web Exploitation
   * **[SOAP](Web%20Exploitation/SOAP/SOAP.md)**
   * **[More SQLi](Web%20Exploitation/More%20SQLi/More-SQLi.md)**