README.md

DownUnderCTF 2023 - encrypted mail

• Category: crypto
• Solves: 3/2073
• Difficulty: ⭐️⭐️⭐️
• Hosting type: tcp
• Tags: Mersenne twister, LFSR, Protocol

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Zero-knowledge authentication, end-to-end encryption, this new mail app has it all. For a limited time, admins may be sending flags to users. Sign up today to get yours!

Handout files:

• ./publish/encrypted-mail.tar.gz

Solution

Flag: DUCTF{wait_its_all_linear_algebra?...always_has_been}

• Solver