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Cryptography20815 marksNumerical: Extended Euclidean algorithmFinite Fields

Find the multiplicative inverse of polynomial (95) using extended euclidean Algorithm.

Find the multiplicative inverse of polynomial (95) using extended euclidean Algorithm. [5]

  • Element to invert: 95 (hexadecimal), interpreted as an element of $GF(2^8)$. - $95{16} = 1001,01012$, giving polynomial $$b(x) = x^7 + x^4 + x^2 + 1$$ - AES irreducible (reduction) polynomial: $$m(x) = x^8 + x^4 + x^3 + x + 1$$ Note: The question only states "95" and "extended Euclidean algori...
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