What is a botnet?

Botnets: definition and protection tips

Botnets are tricky to spot, but they’re all over the internet and they cause all kinds of damage every day. They lurk inconspicuously in the background and use millions of private computers for malicious purposes. This guide explains how botnets work, how to keep them away, and how you can avoid falling victim to an illegal network.

UDP flood

UDP flood

UDP flood attacks have been used in the past for denial-of-service attacks. Even servers for major organisations have collapsed under the massive amounts of data. We’ll explain how a UDP flood attack works and provide you with an overview of its technical background, proven security measures, and how it is different from other DoS attacks.

HTTP Flood Attacks

What is an HTTP flood attack?

DDoS attacks are occurring more and more frequently. Among the most insidious are HTTP flood attacks. Disguised as regular users on the website, thousands of complex requests are sent to the server until a system failure occurs. Here you will learn what exactly an HTTP flood attack is, how you can identify them, and how you can protect yourself from them.

TAN procedures

iTAN, mTAN, chipTAN? An overview of all TAN procedures

Security in online banking has always been a cornerstone of the industry – TAN procedures like chipTAN are what make it possible. However, there are also many other variants of this two-factor authentication system that can be used to protect your banking transactions. As they say, a chain is only as strong as its weakest link – and in this case, it’s the user. Find out which TAN procedures are...

SYN flood

SYN flood attack: variants and countermeasures

The attack pattern of a SYN flood attack has been known since the early years of the World Wide Web. Over time, new attack variants and appropriate protective measures have arisen. DDoS attacks with massive data flows originating from botnets are currently the norm. Learn how SYN flood attacks work. We will explain the concepts of these attacks and countermeasures.

Shoulder surfing

Shoulder surfing – an underestimated threat?

Malicious hackers gain unauthorised access to sensitive data by identifying weaknesses in security mechanisms and exploiting them. However, technical skills are not always required to be able to steal data. This is the case for shoulder surfing which exploits the greatest weakness of every computer system and security measure – the human being.

What is DevSecOps?

What is DevSecOps and what are its uses?

DevSecOps is the optimal approach for achieving faster software development, without having to make any cutbacks to security. Security packages are directly integrated into the development process. We’ll explain its pros and cons and clarify the various possibilities for using the system.

TLS (Transport Layer Security)

TLS: How the Internet is encrypted

Internet security measures have become indispensable these days. Encryption is essential to ensure that unauthorised third parties do not gain access to data or are able to manipulate it. That’s what TLS or Transport Layer Security is for. Here’s what you need to know about this integral element of the modern Internet.

Open and restore a TMP file

Open or restore a TMP file: How it works

Temporary files with the extension are used by many different programs, including the operating system. If you come across cache files that are seemingly no longer used, you can open the respective TMP file to check its content. The following guide explains why there’s no standardised tool for this and how to open TMPs.


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