Exploring Picoctf 2023 Readmycert
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- Used scared and estraces to perform power analysis on AES with chosen plaintexts to extract the key.
- 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 ...
- Solve Cryptography: Task 152:
- There is a regular expression in the source code of the website: "^p.....F!?" - any string that matches the regular expression gives ...
- Use Ghidra to reverse engineer a binary file. The game allows you to move off the top-left corner of the screen, which writes ...
In-Depth Information on Picoctf 2023 Readmycert
Download the CSR file and use either a website CSR decoder or the base64 command to view the flag embedded within it. Using a base64 decoder to read a PEM (Privacy Enhanced Mail) certificate! ==== Social Media ==== Discord: ... 00:00 Intro 00:20 What is a CSR? 01:00 Showing how browsers use certs 03:25 Creating a CSR 04:50 Examining the challenge ... Authors first encrypted the flag with the atbash cipher. Then they used the steghide steganography tool (with no password) to ...
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