Secure Spectrum Sharing via Rate Adaptation

This paper addresses the problem of secure communication in spectrum sharing networks. The achievable rates are determined such that the unlicensed user security is guaranteed, i.e., the unlicensed user massages are not decodable by the license holders. Considering slowly-fading channels, the results are obtained under the licensed user interference- and signal-to-interference-and-noise ratio (SINR)-limited conditions. The results indicate that there is considerable potential for the unlicensed user secure data transmission under different license holder's quality-of-service requirements. Moreover, depending on the channel condition and the license holder's SINR constraint, the unlicensed user's achievable rates may increase with the license holder transmission power

Source-device-independent heterodyne-based quantum random number generator at 17 Gbps

For many applications, quantum random number generation should be fast and independent from assumptions on the apparatus. Here, the authors devise and implement an approach which assumes a trusted detector but not a trusted source, and allows random bit generations at ~17 Gbps using off-the-shelf components