6 lines
701 B
Markdown
6 lines
701 B
Markdown
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## Difficulty
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Hard. It requires knowledge on websocket networking, encoding and decoding, and naturally random number generation. 120 points
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## How To Solve
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The greenies can be expressed in 2 bits each, and in total they form 18 bytes. The seed is XORed with a random bitstring, which forms the first set of greenies. This value is then used in place of the seed to be XORed by the same random bitstring, but bit-shifted by one to the right. Simply find this random bit-string by analysing the random outcomes by reverse XOR-ing, shift it one to the left, and XOR that with the first harvest. This will give you the seed in binary, convert it to ascii to uncover the string!
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## Flag
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IGCTF{oLdMcDoNaLd}
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