Recent measurements of the Windows code-signing certificate ecosystem have highlighted various forms of abuse that allow malware authors to produce malicious code carrying valid digital signatures. However, the underground trade that allows miscreants to acquire such certificates is not well understood. In this paper, we illuminate two aspects of this trade. First, we investigate 4 leading vend...

INTRODUCTION The accuracy of death certificates is essential for public health prevention and research in the State of Louisiana. This article analyzes the accuracy of cause of death stated on Louisiana death certificates. METHODS Discharge diagnoses from 2007 Louisiana Hospital Inpatient Discharge Diagnosis (LAHIDD) data were compared with the diagnoses in the cause of death section in the c...

Various types of certificates are basic tools of modern cryptography and networks security. They are used in various protocols, in the form of public key identity certificates, binding a key to its owner or in the form of attribute certificates, being a proof of rights and capabilities of their owner. Management of certificates (creation, distribution, verification, and revocation) is dependent...

COVID-19 vaccines have been rolled out in many countries and with them a number of vaccination certificates. For instance, the EU is utilizing digital certificate form QR-code that digitally signed can be easily validated throughout all countries. In this article, we document current state market darkweb focus on Digital Green Certificate (DGC) . We investigate 17 marketplaces 10 vendor shops i...

In this paper we propose a new Identity-based certificateless proxy signature transferable to a chain of proxy signers enabling fine-grained delegation, Authentication and Authorization decoupling, and Attributes-based Authorization within the Grid environment without relying on any kind of PKI certificates, proxy certificates or attribute certificates. Security and performance analysis of the ...

A barrier certificate can separate the state space of a considered hybrid system (HS) into safe and unsafe parts according to the safety property to be verified. Therefore this notion has been widely used in the verification of HSs. A stronger condition on barrier certificates means that less expressive barrier certificates can be synthesized. On the other hand, synthesizing more expressive bar...