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$c(y) = (03)y^3 + (01) y^2 + (01) y + (02)$

Let $d = (01)b$ in the AES field $GF(2^8)$.

Provide exact equations for the bits $d_i, 0 \leq i \leq 7$, in terms of the bits $b_i$ of b.

Can some give me an example or hint? I don't know where to start..

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