Threats against witness

Witness-Indistinguishability Against Quantum Adversaries

Proof systems are a central concept in complexity theory and cryptography. Zero-knowledge and witnessindistinguishability are useful security properties of proof systems. Considering the increased power of quantum computation, it comes as a natural question to understand what happens to these security properties when quantum computation becomes feasible. Zero-knowledge [GMR89] is the security p...

Cyber Threats Foresight Against Iran Based on Attack Vector

Cyber ​​threats have been extraordinary increased in recent years. Cyber ​​attackers, including government agencies or hackers, have made significant advances in the use of various tools for attacking target systems in some countries particularly on Islamic republic of Iran. The complexity of cyber threats and the devastating effects of them on critical systems highlights necessity of cyber thr...

Protecting Against Unsampled Ionospheric Threats

Nominally, the mid-latitude ionosphere sampled by WAAS is smooth and slowly varying. However, during ionospheric storms, small-scale irregularities may form. These irregularities cause rapid changes in Total Electron Content (TEC) over comparatively short distances. WAAS has observed changes greater than 20 meters of vertical delay at the GPS L1 frequency over a few hundred kilometers. Such fea...

Defending Against Advanced Persistent Threats

Threats and assaults against psychiatrists.

In this article, the authors review the literature on surveys pertaining to threats and assaults on psychiatrists and report the results of a questionnaire sent to Oregon psychiatrists. Although the responding psychiatrists were experienced clinicians, they appear to have had relatively little life experience with aggression. Assaults and threats were frequent in their careers, occurred across ...