Q. Consider the following statements regarding QKD:
1.Unlike traditional cryptography which relies on mathematical complexity, QKD bases its security on the fundamental laws of quantum mechanics.
2.In a QKD system, any attempt by an eavesdropper to intercept the key will disturb the quantum bits (qubits), thereby alerting the legitimate users.
Which of the statements given above is/are correct?
Answer: C
Notes:
Explanation:
- Statement 1 is correct: Traditional encryption can be cracked by powerful computers; QKD is “unconditionally secure” because it relies on physics.
- Statement 2 is correct: In quantum physics, the act of observing/measuring a system changes it. If an eavesdropper tries to read the qubit, the disturbance is immediately detectable by the sender and receiver.
