Capture the Flag

Caesar Cipher 1

PicoCTF 2018 Walkthrough – Caesar Cipher 1

Caesar Cipher 1 Category: Cryptography Points: 150 Problem This is one of the older ciphers in the books, can you decrypt the message? You can find the ciphertext in /problems/caesar-cipher-1_2_73ab1c3e92ea50396ad143ca48039b86 on the shell server. Hint caesar cipher tutorial Solution If you are interested in cryptography or if you have read any basic article related to cryptography you have …

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Client Side is Still Bad

PicoCTF 2018 Walkthrough – Client Side is Still Bad

Client Side is Still Bad Category: Cryptography Points: 150 Problem I forgot my password again, but this time there doesn’t seem to be a reset, can you help me? http://2018shell.picoctf.com:8249 (link) Hint Client Side really is a bad way to do it. Solution In this problem, we are just given a site and on opening that site we …

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PicoCTF 2018 Walkthrough – Crypto Warmups

Crypto Warmup 1 Category: Cryptography Points: 75 Problem Crpyto can often be done by hand, here’s a message you got from a friend, llkjmlmpadkkc with the key of thisisalilkey. Can you use this table to solve it?. Hint Submit your answer in our competition’s flag format. For example, if you answer was ‘hello’, you would submit ‘picoCTF{HELLO}’ as the flag. …

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PicoCTF 2018 Walkthrough – Reversing Warmups

Reversing Warmup 1 Category : Forensics Points: 50 Problem Throughout your journey, you will have to run many programs. Can you navigate to /problems/reversing-warmup-1_3_7c0eade7faf60ffe3485e12098e2a6c2 on the shell server and run this program to retrieve the flag? Hint If you are searching online, it might be worth finding how to execute a program in the command …

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