|
|
Careless society: Drivers of (un)secure passwords
Nedvěd, Vojtěch ; Baruník, Jozef (advisor) ; Kukačka, Jiří (referee)
Careless Society: Drivers of (Un)Secure Passwords Thesis abstract Vojtěch Nedvěd May 2, 2021 Vulnerabilities related to poor cybersecurity are a dangerous global economic issue. This thesis aims to explain two examples of poor password management. First, why users use similar password and username and second, why they reuse their passwords, as the main drivers of this behaviour are unknown. We examined the effects of selected macroeconomic variables, gender, password length and password complexity. Additionally, this thesis suggest how to estimate sentiment in passwords using models build on Twitter posts. The results are verified on large password data, including password leaks from recent years. There are four main findings. First, a higher cybersecurity index and diversity of a password seem to be related to the lower similarity between a username and a password. Second, it seems that there are structural differences between countries and languages. Third, the sentiment seems to be a significant determinant too. Fourth, password reuse seems to be positively affected by the cybersecurity level. The thesis contributes to the study of password management. It proposes how to model the relationship, derive the data, split the passwords into words, model the sentiment of passwords, what variables might be...
|
|
|
What Are the Elements with Strongest Impact on Life Expectancy?: A Study Focused on the United Mexican States During Recent Years
Nedvěd, Vojtěch ; Paulus, Michal (advisor) ; Herman, Dominik (referee)
In this thesis, we focus on the determinants of life expectancy at birth in Mexico's federative entities. The aim is to consider three selected variables determining life expectancy - health care expenditures, unemployment, and school enrolment. We use panel data for up to 21 year period (1994-2014) controlling for already well-examined determinants (vaccination coverage, literacy rate, and infant mortality rate). Fixed e↵ect or random e↵ect estimation is applied according to the hypo- theses. Robustness test is performed using Principal Component Analysis including proxies of the main four groups of variables a↵ecting life expect- ancy - economic, social, health care and environmental. The results suggest a positive e↵ect of health care expenditures on life ex- pectancy at birth. However, a significant e↵ect of unemployment or primary school enrolment is not confirmed. Principal Component Analysis suggests the existence of additional determinant related to health care expenditures a↵ecting life expectancy. This thesis contributes to the debate on discussed variables (healthcare expenditures, unemployment, and primary school enrollment) related to life expectancy. We also extend the limited research on life expectancy in Mexico and Latin America.
|
guest ::
RSS feed.