12 lines
615 B
YAML
12 lines
615 B
YAML
slug: santas_lcg
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title: "Santa's LCG"
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description: "Santa's Inteligence Office bragged their “quantum” token generator was unbreakable, but the promo leak reveals consecutive outputs from an old Linear Congruential Generator. Predict the next 32-bit output and submit it to /flag?token= to claim the secret information."
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category: "crypto"
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points: 800
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is_visible: true
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complexity: 8
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zip: "local"
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flag_plaintext: "CTF{lcg_m4d3_1ns3cure_t0k3ns}"
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hints:
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- text: "The page shows several consecutive 32-bit outputs from an LCG (mod 2^32). Try small integer arithmetic and inspect relations."
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penalty_points: 10 |