NIST Randomness Tests on the Extended Key of Quantum Noise Random Stream Cipher

This paper focuses on the key expansion of quantum noise random stream cipher (QNRC). We performed NIST randomness tests on the extended key. Also, a new Hash expansion algorithm with higher efficiency in counter mode was proposed. Test results showed that the extended key via advanced encryption standard (AES) and Hash both in counter mode can satisfy the randomness requirement. It conformed to the premise of using the key safely, while realizing efficient expansion.