$ ctf42

Honey_I_Blew_Up_the_IC

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Have you ever wonder how people are reversing ICs based on SEM pictures?

More handy than a SEM, we've scaled up a bunch of gates so you can try by yourself with naked eyes, in 3D! Observe the wooden structure on the CTF table. Photos allowed, but please keep the structure on the CTF table.

Which pins are the inputs? Which pin is the output? Once they are identified, order the inputs alphabetically and generate the truth table. The flag is the concatenation of inputs + output + output bits of the truth table. If you need to indicate a "don't care"/Hi-Z state, put a X.

For example if K and J are inputs, L the output and the function is L = K OR J, the truth table is

J K L and the flag is FLAG{JKL0111}

If you have doubts in the way to forge your flag, don't hesitate to ask us.

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