Question

For the cipher text 0000 0111 0011 1000 and Key 0110 1111 0110 1011, apply the Simplified AES to obtain the plaintext. The plain text is

(a) 0110 1001 0111 0001

(b) 0110 1111 0110 1011

(c) 0010 1001 0110 1011

(d) 1111 0101 0111 1111

The question was asked in an interview for job.

The query is from The AES Algorthm in section Advanced Encryption Algorithm and Block Cipher Operation of Cryptograph & Network Security

Answer 1

Correct answer is (b) 0110 1111 0110 1011

Explanation: On applying the simplified AES we would obtain 0110 1111 0110 1011 as the plain text.