The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The quantitative security of quantum-noise randomized cipher (QNRC) in optically amplified links is analyzed from the perspective of physical-layer advantage. Establishing the wire-tap channel models for both key and data, we derive the general expressions of secrecy capacities for the key against ciphertext-only attack and known-plaintext attack, and that for the data, which serve as the basic performance...
We propose an improved scheme of hybrid quantum key distribution based on the combination of differential phase shift and BB84 polarization encoding. By adjusting the polarization properly and routing all the probability amplitudes to interfere, a higher protocol efficiency of 3/2 is obtained. A better stability can be achieved with the birefringence effects and polarization-dependent losses at the...
A novel approach to photonic generating ultra-wideband (UWB) signals based on a multi-tap microwave photonic filter (MPF) structure is proposed. By configuring the MPF, a tunable notch-band can be introduced to the spectral profile of the generated UWB signals, which can effectively avoid the signal interference between UWB signals and the pre-planned Wi-Fi wireless signals. The proposed approach...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.