Java Code Analysis Picoctf 2023 Ctf For Beginners

Modify a JWT token that has a non-random signing key.

Video writeup for the

In this video, Tib3rius solves the medium rated "

In this picoGym (

Hey guys it's Ben today I'm going to be walking through the

Challenge:

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Weird bash shell capitalizes the first thing you type and spellchecks some of the rest. Using & to separate shell commands, find ...

There is a regular expression in the source

SQL injection from a sqlite database. Queries are: (with spaces after --) 'or 1=1;-- Algies' union select sql,1,1 from sqlite_master;-- ...

Uses a one bit leak per encryption to break the encryption key, one byte at a time. # python 3

Authors first encrypted the flag with the atbash cipher. Then they used the steghide steganography tool (with no password) to ...

Use Wireshark to open the PCAP file. In one of the ethernet packets is the first portion of the flag, base64 encoded. Using that first ...

This is how I solved the repetitions

00:00 Intro 00:25 'files' 00:45 Creating our own .class file 01:50 'strings' 02:15 Flag! 02:20 Examining the .class file 02:45 JD-GUI ...