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This July 2025, I had the incredible opportunity to participate in the CIMPA Research School on “Arithmetic in Action: Number Theory and its Applications to Cryptography and Coding Theory” held at Universitas Gadjah Mada in Yogyakarta, Indonesia. As a cryptography enthusiast, this experience was amazing and really opened my mind to the deep mathematical foundations underlying modern cryptographic systems.
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In this post, we will demonstrate how to crack Python’s random module by exploiting the linearity in the Mersenne Twister PRNG. The challenge is taken from Cyber Jawara 2024 Finals and actually consist of two different challenge. The solution to this challenge was inspired by this writeup.
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Saya bermain dengan tim dimas fans club dan mendapatkan posisi pertama.
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In this blog, I will share my solutions during competition. While some of my solutions differ from the official ones, others follow the same ideas but are presented in different ways.