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 Uses a one bit leak per encryption to break the encryption key, one byte at a time. # python 3 In this video we decompile a small There is a regular expression in the source This is how I solved the repetitions CTF challenge from the Weird bash shell capitalizes the first thing you type and spellchecks some of the rest. Using & to separate shell commands, find ... 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 ... Decompile an Android APK file using an online decompiler ( javadecompilers.com/apk) and find the flag in the resulting ... Authors first encrypted the flag with the atbash cipher. Then they used the steghide steganography tool (with no password) to ...