Does it is possible to implement the components of a SBOX tables using lookup\_tables. For example for a 4-bit SBOX it is possible to obtain the component 3 using SAGE in the following way

```
sage: from sage.crypto.sbox import SBox
sage: S = SBox([7,6,0,4,2,5,1,3])
sage: f3 = S.component_function(3)
sage: f3.algebraic_normal_form()
x0*x1 + x0*x2 + x0 + x2

```

But I need to use that component several times (lime $2^{20}$), and boolean function in SAGE with substitution are so slow. Than I think it is better to use lookup tables.