Comment on 'Secure Communication using mesoscopic coherent states', Barbosa et al, Phys Rev Lett 90, 227901 (2003)
arXiv:quant-ph/0502032 · doi:10.1103/PhysRevLett.94.048901
Abstract
In a recent letter, Barbosa et al [PRL 90, 227901(2003)] claim that secure communication is possible with bright coherent pulses, by using quantum noise to hide the data from an eavesdropper. We show here that the secrecy in the scheme of Barbosa et al is unrelated to quantum noise, but rather derives from the secret key that sender and receiver share beforehand.
References in corpus (1)
Cited by in corpus (5)
- Generalized synchronization of chaos for secure communication: remarkable stability to noise
- Quantum Noise Randomized Ciphers
- Effect of noise on generalized synchronization of chaos: theory and experiment
- Barbosa et al. Reply to ``Comment on 'Secure Communication using mesoscopic coherent states', Barbosa et al, Phys Rev Lett 90, 227901", Yuan and Shields, Phys. Rev. Lett. 94, 048901(2005)
- On the security of AlphaEta: Response to `Some attacks on quantum-based cryptographic protocols'