Picoctf 2023 Java Code Analysis

Summary

Modify a JWT token that has a non-random signing key. In this video, Tib3rius solves the medium rated " Hey guys it's Ben today I'm going to be walking through the Authors first encrypted the flag with the atbash cipher. Then they used the steghide steganography tool (with no password) to ... In this video we decompile a small Weird bash shell capitalizes the first thing you type and spellchecks some of the rest. Using & to separate shell commands, find ... Uses a one bit leak per encryption to break the encryption key, one byte at a time. # python 3 This is how I solved the repetitions CTF challenge from the There is a regular expression in the source 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 ... You are given a ciphertext, and the value of d, but are not given n. Knowing that e*d mod (p-1)(q-1)=1, and that p and q are 128 bit ...