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What is DNS over HTTPS (DoH) and how does it work?
DNS over HTTPS (DoH) sends Domain Name System (DNS) queries using HTTPS, the secure web protocol also used for encrypted website connections. That helps protect DNS traffic from being read or altered ...
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Tracking pixel: How it works and how to protect your privacy
Tracking pixels are small, hidden tools that help companies measure what people do online. They can log signals such as email opens, page visits, ad clicks, and conversions, often without any obvious ...
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Kronos Private Cloud (KPC) ransomware attack: What happened and what can be learned
When a payroll platform goes offline, the disruption can extend far beyond a single company. That’s what happened during the Kronos Private Cloud (KPC) ransomware attack, disclosed in December 2021,...
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What is Google DNS, and how does it work?
Google Public DNS is a recursive resolver in the Domain Name System (DNS) that translates domain names, such as expressvpn.com, into IP addresses. This guide covers how it works, its features, how thi...
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Linux security explained: A guide to protecting your system
Linux has a reputation for solid security, but the real story is more practical than that. Security on Linux comes from how the system is built, and from what you choose to run, expose, and update ove...
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Elliptic curve cryptography explained: How ECC works, why it matters, and where it’s used
As digital communication expands across devices and networks, the need for efficient and reliable encryption continues to grow. Elliptic curve cryptography (ECC) has become a standard solution due to ...
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Golden ticket attack: What it is and how to defend against it
In many Windows environments, Active Directory (AD) is responsible for authenticating users and controlling access to systems. When attackers gain deep access to these identity systems, they can forge...
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Google Shielded Email: What it is and alternatives you can use today
Google was reported in 2024 to be working on a new feature called Shielded Email that would let users create email aliases for sign-ups without revealing their primary address. However, this feature h...
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What are super cookies? Types, risks, and removal steps
Most websites use cookies to function, but they can also be used to build detailed user profiles, which is why many people clear them regularly. However, deleting ordinary browser cookies doesn't alwa...
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Password attacks: Common types and how to prevent them
Passwords control access to nearly every digital service, from personal banking to corporate networks. Attackers exploit this with automated tools to steal, guess, or capture credentials at scale. Thi...
