Quantum Stream Cipher for Secure Communication

Tao Shang

Joseph Mariamichael, A. Albert Raj, Ravi Selvaraj

Abstract This survey presents on the implementations of Quantum Noise Stream Cipher or Quantum Steam Cipher with various modulation formats – like QAM, PSK. FSK, etc., in optical fiber communication systems – along with other pertinent implementation details. Quantum Stream Cipher can be provably secure in information theoretical terms, and it achieves improved security due its inherent (noisy) randomness. This paper presents also a brief review on its claimed improved security, along with the open issues.

Shuaidong Chen, Bo Liu, Jianxin Ren +11 more

Fumio Futami, Kentaro Kato, Osamu Hirota

For protecting physical layer of optical fiber communication systems, quantum stream cipher called Y-00 and Alpha-Eta is promising. So far, we demonstrated secure and high speed optical fiber communication experiments using Y-00 quantum stream cipher. Our theoretical research revealed that the randomization techniques could enhance the security performance. In this work, we fabricated a novel Y-00 transceiver for GbE where the randomization technique was implemented. The transceiver employed the optical intensity modulated Y-00 quantum stream cipher with intensity levels of 4096. An appropriately designed irregular mapping as the randomization technique was experimentally demonstrated. The transceiver was successfully applied to secure optical fiber transmission of GbE signals.

Ilga Krūza

Ken Tanizawa, Fumio Futami

We present the first experimental demonstration of digital-coherent PSK Y-00 quantum stream cipher employing noise masking for secure communications. Successful demodulation with decryption in digital domain is achieved for 10-Gbit/s Y-00 cipher with 1024 bases.