EC-Council
312-50V9 · Question #426
312-50V9 Question #426: Real Exam Question with Answer & Explanation
The correct answer is B: 11010111 00010001. XOR decryption recovers the original plaintext by XORing the ciphertext with the key, since XOR is its own inverse operation.
Question
A hacker was able to sniff packets on a company's wireless network. The following information was discovered: The Key 10110010 01001011 The Cyphertext 01100101 01011010 Using the Exlcusive OR, what was the original message?
Options
- A00101000 11101110
- B11010111 00010001
- C00001101 10100100
- D11110010 01011011
Explanation
XOR decryption recovers the original plaintext by XORing the ciphertext with the key, since XOR is its own inverse operation.
Common mistakes.
- A. 00101000 11101110 is not the result of XORing the given key and ciphertext values.
- C. 00001101 10100100 is not the result of XORing the given key and ciphertext values.
- D. 11110010 01011011 is not the result of XORing the given key and ciphertext values.
Concept tested. XOR cipher decryption using key and ciphertext
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