We describe, build, and evaluate Lockdown, a system that significantly increases the level of security for online transactions, even on a platform infested with malicious code. Lockdown provides the user with a highly-protected, yet also highly-constrained trusted environment for performing online transactions, as well as a high-performance, general-purpose environment for all other (non-securi...

We describe, build, and evaluate Lockdown, a system that significantly increases the level of security for online transactions, even on a platform infested with malicious code. Lockdown provides the user with a highly-protected, yet also highly-constrained trusted environment for performing online transactions, as well as a high-performance, general-purpose environment for all other (non-securi...

During crisis events, people often seek out event-related information to stay informed of what is happening. However, when information from official channels is lacking or disseminated irregularly, people may be at risk for exposure to rumors that fill the information void. We studied information-seeking during a university lockdown following an active-shooter event. In study 1, students in the...

Applications written in low-level languages without type or memory safety are especially prone to memory corruption. Attackers gain code execution capabilities through such applications despite all currently deployed defenses by exploiting memory corruption vulnerabilities. Control-Flow Integrity (CFI) is a promising defense mechanism that restricts open control-flow transfers to a static set o...

Applications written in low-level languages without type or memory safety are prone to memory corruption. Attackers gain code execution capabilities through memory corruption despite all currently deployed defenses. Control-Flow Integrity (CFI) is a promising security property that restricts indirect control-flow transfers to a static set of well-known locations. We present Lockdown, a modular,...

The administrator of an enterprise network has a responsibility to enforce the policies on the network. Yet, most security mechanisms do not map well to the intended policies. This has been due to the prevalence of simplistic tools that have poor enforcement but, yet are easy to manage. While advanced commercial solutions do exist that have stronger enforcement, they are significantly harder to...

COVID-19 is a huge tragedy for the world community. Everything in the world is affected due to this pandemic right from economy to resources where the economy of major countries of the world are facing recession and resources are surplus with no takers at all. The measures to contain COVID-19 pandemic include lockdown, social distancing, isolation, and home quarantine. Lockdown adopted by the d...

The administrator of an enterprise network has a responsibility to enforce the policies on the network. Yet, most security mechanisms do not map well to the intended policies. This has been due to the prevalence of simplistic tools that have poor enforcement but, yet are easy to manage. While advanced commercial solutions do exist that have stronger enforcement, they are significantly harder to...

As Moore’s law continues to reduce the cost of computation at an exponential rate, embedded computing capabilities spread to ever-expanding application scenarios, such as smartphones, the Internet of Things, and automation, among many others. This trend has naturally caused the underlying technology to evolve and has introduced increasingly complex microarchitectures into embedded processors in...

Objectives: The proportion of older people in the population is very high. Many countries have been on lockdown due to the outbreak of COVID-19, with older adults being under higher mental, physical, and emotional pressures. The present study aimed to explain the lived experiences of older adults during the COVID-19 pandemic lockdown in Iran. Materials and Methods: This qualitative phenomenol...