Which function can be used in AES multiplication –(a) m(x)=x^7+x^4+x^3(b) m(x)=x^8+x^4+x^3+x+1(c) m(x)=x^8+x^3+x^2+x+1(d) m(x)=x^8+x^5+x^3+xThis question was addressed to me in an interview for job.My question is taken from Overview in chapter Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security

Which function can be used in AES multiplication –(a) m(x)=x^7+x^4+x

1.	Which function can be used in AES multiplication –(a) m(x)=x^7+x^4+x^3(b) m(x)=x^8+x^4+x^3+x+1(c) m(x)=x^8+x^3+x^2+x+1(d) m(x)=x^8+x^5+x^3+xThis question was addressed to me in an interview for job.My question is taken from Overview in chapter Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security
Answer» The CORRECT answer is (b) m(X)=x^8+x^4+x^3+x+1 Explanation: m(x)=x^8+x^4+x^3+x+1 STANDS for 100011011 which is an IRREDUCIBLE polynomial. Others are not irreducible polynomials.

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