Josh Fruhlinger

Josh Fruhlinger is a writer and editor who lives in Los Angeles.

What is a Trojan horse? How this tricky malware works

What is PKI? And how it secures just about everything online

What is PKI? And how it secures just about everything online

Public key infrastructure (PKI) is a catch-all term for everything used to establish and manage public key encryption, one of the most common forms of internet encryption. It is baked into every web browser in use today to secure...

How a service mesh helps manage distributed microservices

How a service mesh helps manage distributed microservices

A service mesh brings security, resiliency, and visibility to service communications, so developers don’t have to

What is malware? How to prevent, detect and recover from it

What is malware? How to prevent, detect and recover from it

Malware is a blanket term for viruses, worms, trojans, and other harmful computer programs hackers use to wreak destruction and gain access to sensitive information. Learn what malware does and how you can remove it—or prevent it.

What is opsec? A process for protecting critical information

What is opsec? A process for protecting critical information

Opsec, which stands for operations security, is a process by which organizations assess and protect public data about themselves that could, if properly analyzed and grouped with other data by a clever adversary, reveal a bigger...

The 6 biggest ransomware attacks of the last 5 years

The 6 biggest ransomware attacks of the last 5 years

The biggest ransomware attacks illustrate how this particularly nasty genre of attack software has grown from a curiosity and an annoyance to a major crisis.

What is a honeypot? A trap for catching hackers in the act

What is a honeypot? A trap for catching hackers in the act

A honeypot is a system designed to lure hackers into revealing their origins and techniques, and they're used by security researchers and corporate IT alike.

What is Linux? Everything you need to know about the open-source operating system

What is Linux? Everything you need to know about the open-source operating system

Linux has long been the basis of commercial networking devices, but now it's a mainstay of enterprise infrastructure.

What is a digital twin? [And how it’s changing IoT, AI and more]

What is a digital twin? [And how it’s changing IoT, AI and more]

Digital twins are virtual replicas of physical devices that data scientists and IT pros can use to run simulations before actual devices are built and deployed. They are also changing how technologies such as IoT, AI and analytics are...

What is digital forensics? And how to land a job in this hot field

What is digital forensics? And how to land a job in this hot field

Digital forensics is the application of scientific investigatory techniques to digital crimes and attacks. Think beyond the awful (and justly cancelled) TV show CSI Cyber; digital forensics is a crucial aspect of law and business in...

What is a CISO? Responsibilities and requirements for this vital leadership role

What is a CISO? Responsibilities and requirements for this vital leadership role

The chief information security officer (CISO) is the executive responsible for an organization's information and data security. Learn what it takes to land a CISO job and how to be successful in the role.

What is ransomware? And 4 steps to prevent these file-locking attacks

What is ransomware? And 4 steps to prevent these file-locking attacks

Ransomware is a form of malware that encrypts a victim's files. The attacker then demands a ransom from the victim to restore access to the data upon payment. 

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