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YouTube

One Time Pad and Schrödinger's Pad Cryptography Tutorial

CryptoCat via YouTube

Overview

Learn how to solve the "Schrödinger's Pad" cryptography challenge from the Intigriti 1337UP LIVE CTF 2024 in this detailed walkthrough video. Explore the vulnerability of reusing one-time pads (OTP) with a quantum computing twist, where encryption operations vary depending on whether Schrödinger's cat is observed as alive or dead. Begin with an XOR operation review, progress through the challenge's core functionality, understand the critical security flaw in OTP reuse, and discover how to determine the cat's state to decrypt the message. Follow along with the complete solve script demonstration and gain practical experience in cryptographic exploitation techniques. Access additional resources including a comprehensive written writeup, CTF competition details, and opportunities to join the Intigriti hacking community.

Syllabus

Intro
XOR recap warmup - IrrORversible
Review basic functionality
Problem with OTP reuse
Is the cat dead or alive?
Solve script
Conclusion

Taught by

CryptoCat

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