# picoGym - [Cryptography](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography.md) - [Mod 26](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/mod-26.md): Cryptography can be easy, do you know what ROT13 is? cvpbPGS{arkg\_gvzr\_V'yy\_gel\_2\_ebhaqf\_bs\_ebg13\_uJdSftmh} - [Mind Your Ps and Qs](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/mind-your-ps-and-qs.md): In RSA, a small e value can be problematic, but what about N? Can you decrypt this? values - [Easy Peasy](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/easy-peasy.md): A one-time pad is unbreakable, but can you manage to recover the flag? (Wrap with picoCTF{}) nc mercury.picoctf.net 11188 otp.py - [The Numbers](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/the-numbers.md): The numbers... what do they mean? - [New Caesar](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/new-caesar.md): We found a brand new type of encryption, can you break the secret code? (Wrap with picoCTF{}) apbopjbobpnjpjnmnnnmnlnbamnpnononpnaaaamnlnkapndnkncamnpapncnbannaapncndnlnpna new\_caesar.py - [Mini RSA](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/mini-rsa.md): What happens if you have a small exponent? There is a twist though, we padded the plaintext so that (M \*\* e) is just barely larger than N. Let's decrypt this: ciphertext - [Dachshund Attacks](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/dachshund-attacks.md): What if d is too small? Connect with nc mercury.picoctf.net 37455. - [No Padding, No Problem](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/no-padding-no-problem.md): Oracles can be your best friend, they will decrypt anything, except the flag's ciphertext. How will you break it? Connect with nc mercury.picoctf.net 10333 - [Easy1](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/easy1.md): The one time pad can be cryptographically secure, but not when you know the key. Can you solve this? We've given you the encrypted flag, key, and a table to help UFJKXQZQUNB with the key of SOLVECRYPT - [13](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/13.md): Cryptography can be easy, do you know what ROT13 is? cvpbPGS{abg\_gbb\_onq\_bs\_n\_ceboyrz} - [Caesar](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/caesar.md): Decrypt this message. - [Pixelated](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/pixelated.md): I have these 2 images, can you make a flag out of them? scrambled1.png scrambled2.png - [Basic-Mod1](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/basic-mod1.md): Take each number mod 37 and map it to the following character set: 0-25 is the alphabet (uppercase), 26-35 are the decimal digits, and 36 is an underscore. Wrap your decrypted message in picoCTF. - [Basic-Mod2](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/basic-mod2.md) - [Credstuff](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/credstuff.md): We found a leak of a blackmarket website's login credentials. Can you find the password of the user cultiris and successfully decrypt it? Download the leak here. - [morse-code](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/morse-code.md) - [rail-fence](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/rail-fence.md): A type of transposition cipher is the rail fence cipher, which is described here. Here is one such cipher encrypted using the rail fence with 4 rails. Can you decrypt it? - [Substitution0](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/substitution0.md): A message has come in but it seems to be all scrambled. Luckily it seems to have the key at the beginning. Can you crack this substitution cipher? - [Substitution1](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/substitution1.md): A second message has come in the mail, and it seems almost identical to the first one. Maybe the same thing will work again. - [Substitution2](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/substitution2.md): It seems that another encrypted message has been intercepted. The encryptor seems to have learned their lesson though and now there isn't any punctuation! Can you still crack the cipher? - [Transposition-Trial](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/transposition-trial.md): Our data got corrupted on the way here. Luckily, nothing got replaced, but every block of 3 got scrambled around! - [Vigenere](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/vigenere.md): Can you decrypt this message? - [HideToSee](https://ir0nstone.gitbook.io/notes/writeups/picogym/cryptography/hidetosee.md): How about some hide and seek heh? Look at this image here. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ir0nstone.gitbook.io/notes/writeups/picogym.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. 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