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To solve the challenge, you must reverse the keystream generator to recover the initial state (the key):

The graph above illustrates the of T-functions: bit only depends on bits , allowing for the bit-by-bit recovery used in the exploit. ti_moe_more

: The state size or the complexity of the mixing function is insufficient to prevent a guess-and-determine attack or a simple breadth-first search on the bit transitions [3, 5]. Solution Strategy (Write-up) To solve the challenge, you must reverse the

The vulnerability in stems from the predictable bit-propagation within the T-function: Bit-by-Bit Leakage : Because the While T-functions are often used to create long-period

-th bits of the input [3]. While T-functions are often used to create long-period sequences, improper implementation can lead to significant linear vulnerabilities. Key Vulnerabilities

: Observe that the LSB of the keystream is directly tied to the LSB of the initial state. Bit-Stepping : Assume the first bits of the state are known. Simulate the T-function for the next bit (